Archive for the ‘Product Review’ Category

Cataracts, Lens Implants, and Disappointments

Tuesday, February 16th, 2010

Last year, I began having trouble seeing well at night. This was especially troublesome when driving. I would see a lot of glare, and multiple images, especially of headlights and taillights. I knew this was caused by worsening cataracts, and my Optometrist recommended that I have the cataracts removed. He recommended an eye surgeon in Wilkes-Barre to do the surgery.

My initial visit with the surgeon confirmed that I did indeed have cataracts as the source of my trouble, and he recommended that I get multi-focal implants. He told me that with these implants, I would be able to see well at distance, intermediate, and reading distances. His recommendation was to put a Technis lens in my left eye, and a ReZoom in the right (at an additional cost of $2400 per eye).

According to the surgeon, I should expect to have good vision with some halos around bright lights and some glare with these lens. He also told me that he could not correct my astigmatism with the implants, so I would either have to wear single vision glasses, or have Lasik surgery later to correct the astigmatism. He said the cataract surgery and lens implantation was quick and painless.

I arrived at the surgery center early in the morning, and the nurses started putting drops in my eye almost as soon as I got there. I think there were over 10 different drugs they were putting in my right eye. They also started an IV drip containing mannitol. When it was time for the surgery, an anesthetist administered IV Versed, a drug which induces amnesia so you don’t remember too much.

During the surgery, I was awake, and remember the event even with the Versed. I was instructed to look at 3 lights which I assume was in his microscope. I felt no pain when he made the incision, and when my lens was removed. I know when the lens was removed because the lights I was looking at quickly went out of focus, and all I could see was light. Shortly after that, I did feel pain. I think this happened when he injected the implant lens and positioned it in my eye. The implant is rolled up like a taco and inserted through a syringe like device.

The entire procedure only took a couple of minutes, and they wheeled me out of the operating room. A few more minutes to remove my IV, and I was on my way to breakfast. As soon as the operation was over, I had some vision in my eye. Since my glasses no longer worked and I still had the astigmatism, nothing was clear though.

My wife drove me the 30 mile trip back home, and I rested the remainder of the day. I had some strange visual experiences in that eye the rest of the day, probably because of the meds or irritation. For about an hour, it looked like there was a mound of worms crawling around in the upper right quadrant of my visual field. After that effect dissipated, my eye became foggy, like looking through a smoke filled room. This lasted a couple hours also.

The day after surgery, I removed the right lens from my eyeglasses so I could see well with my left (unoperated) eye. I had an appointment scheduled with the surgeons partner who provided post surgery follow up. He evaluated my incision, and the interior of my eye. The interior pressure had spiked dangerously, so he prescribed a glaucoma drug called Combigan to lower the pressure.

I had several more followup visits with the surgeons partner, and he said I was healing well. However, my vision was not improving, and if anything, was getting worse. However, the doctor assured me that it was too soon to evaluate, and it would get better.

Two weeks after the first surgery, I had the left eye done, with a Technis lens.

The first problem I noticed was a starburst pattern around anything bright. This looked like a Fourth of July firework exploding when I looked at a bright point source of light. For example, when viewing an ordinary LED light from a distance of 20 feet, I see the LED, with 16 more just like it arranged in a pattern around it. This was certainly not what I expected and not what I would call a halo.

The second major problem I noticed is that solid objects appear to have transparent edges when viewed from distances greater than arms length. This is really annoying when looking a people’s faces, and TV images, and cannot in any way be considered normal vision. The only time this effect goes away is in very bright light, like broad daylight outdoors.

The third major problem is additional images of objects. For instance when looking at a newsprint sized letter, I see an additional letter slightly to the left, another above, and 2 more diagonally down to the right. These images are not as strong, but nevertheless are quite noticeable.

It was obvious that the starburst pattern was an aberration of the ReZoom lens itself, because of its inherent symmetry. However the other ghost images had no symmetry, and I believe are not really caused by the implants themselves unless the implants are defective. I believe they are caused by wrinkles in my cornea resulting from the surgical incisions causing my eyes to focus the same image at multiple points on my retinas.

After the second eye was implanted, I had no eyeglasses to improve my poor vision. Neither of my doctors offered to make me new glasses, so I took it upon myself to make my vision as good as possible under the circumstances. By carefully measuring the starburst aberration in my right eye, I was able to mathematically compute a prescription to correct the astigmatism in my right eye. Knowing that the astigmatism had always been the same for both eyes, I ordered glasses to my homemade prescription from an internet company. When the glasses came, they were indeed a huge improvement, and they corrected my right eye for distance in bright light very well. The left eye remained fuzzy at all distances. BUT, I still could not read with them even though my astigmatism was corrected. (If a circle looks eggshaped or a square appears to be a rectangle, it indicates uncorrected astigmatism. If it appears to be the right shape the astigmatism is corrected.)

At this point, I was very concerned that all was not going well, and I feared that I would never see correctly again. So I scheduled an appointment with the surgeon, and I took all my notes and drawings of what I actually see along so he would have as much information as possible. It had been 6 weeks since my right eye surgery, and I still had pain, and poor vision.

The doctor sent several technicians to measure my eyes and visual acuity. He totally was uninterested in the drawings and notes I had made, and told me I needed to have Lasik to correct my astigmatism. He also told me I needed bifocals. I reminded him that the entire purpose of paying $4800 extra was to have good vision without bifocals, whereupon he completely ignored that fact. Instead, he blamed me for not trying hard enough to see. I told him the starbursts were much worse than the cataracts, and that I did not feel comfortable driving at night. I told him that people should not have transparent edges. Instead of helping me, he got visibly irritated and left me sitting in the exam room for over 3 hours. In the end, he prescribed more eye drops and told me to give it more time. How long? Months to a year.

The one thing that I can see clearly is that this doctor and I are not going to have a good relationship. The ability of these multifocal implants to provide good vision at any distance was greatly exaggerated, and the downside of the aberrations was minimized.

I asked the doctor if they could be removed and single vision implants be installed. He really discouraged that idea and implied that the trauma could cause permanently damage my retinas because they could swell up from the released prostaglandins.

So here I am, unable to read a newspaper, with no hope of restoring good vision, and no faith in my eye surgeon. I will report again if there is any change.

Galaxy DX 2547 CB Radio Base Station

Monday, May 25th, 2009

For some time, I have been thinking that a CB radio may be a good thing to have if the economy and the country suffer a worst case meltdown. I started looking for a base station (110v powered) for my house. As it turns out, almost all CB radios made today are mobile units designed to run on 12 volt dc from a vehicles electrical system.

The one base station I did find was a Galaxy DX 2547. This model has been in production for several years, and is generally highly regarded from what I could find out. So, I ordered one from Pacetronics. I also ordered a Solartron A-99 18 foot whip antenna which I installed on my house.

CB Radio

When I hooked everything up, I soon made several local contacts on channel 31 AM1 and got good signal reports. The receive audio quality was very good also. Next I tried SSB2 mode, but found that the clarifier3 would not tune down far enough to allow SSB reception. The radio was not tuned correctly. I could have sent it back to the factory, or the dealer for warranty service, but found a local shop which would retune it for about the same price as the shipping would have cost to send it back. After retuning, the radio works well on both AM and SSB modes, and I am now satisfied with the unit.

What I don’t understand is why seemingly reputable companies ship defective product. It seems that everything I buy is defective in some manner, and needs to be repaired to make it do what it should have done right out of the box.  Is this a symptom of the failing economy, or just bad luck on my part?  I suspect its a sign of the economy with everyone cutting back on manufacturing costs.

Even though I like the radio now that it is correctly tuned, I give a thumbs down to Galaxy for poor quality control on this one.

———

1) AM or Amplitude Modulation is where the level of the carrier frequency is varied up and down according to the waveform of the audio signal.  This creates a range of frequencies equal to the carrier frequency plus and minus the frequencies of the audio signal being transmitted.  AM modulation is wasteful because the information is redundantly transmitted as two sets of side frequencies, and a carrier signal that itself carries no information.

2)  SSB or Single Side Band is the same as AM with either the plus frequencies or the minus frequencies and the carrier removed.  This allows putting all the available transmitter power into one of the sets of frequencies that actually carries the audio signal.  The carrier is generated locally on the receiving system and decodes the SSB signal. SSB signals cannot be received on an AM receiver.

3) The Clarifier control shifts the frequency of the locally generated carrier signal and controls the pitch of the received voice.  It must match the missing AM carrier, or the received signal sounds like donald duck and is not intelligible.

Lowes and TroyBilt
Gas Trimmer Product Report

Friday, May 22nd, 2009

Last week, my grass trimmer finally died. It lived a long productive life, achieving 17 years of useful service before its engine finally gave out. Long live Echo!.

So, I was in the market for a new one. A trip to Lowes revealed two brands to choose from, Troy-Bilt, and Husqvarna. It looked like the latest and greatest was trimmers with 4-cycle engines, the kind where it is not necessary to mix the gas and oil together. After looking them over, I opted for a Troy-Bilt with the plug in attachment system.

When I got it home, I put it together, filled the oil tank with the oil provided, and filled the gas tank. After what seemed like 100 pulls of the starter rope, the engine finally fired off….. and immediately quit again. After several more strenuous restarts, It finally remained running, but only if I held the unit completely vertical. As soon as I tipped it over into cutting position, the engine once again died. I had to warm up the engine 15 minutes before it would run well enough to actually cut grass. This is not what I expected from a Troy-Bilt product.

A design issue I had with the trimmer was that it would not accept aftermarket trimmer heads. Only Troy-Bilt string cartridges would work, and the kind with plastic blades instead of strings (my favorite) could not be adapted to the trimmer. I consider this to be unacceptable.

This morning, I returned the trimmer to Lowes, and to their credit, they issued me a full refund. So I give a thumbs down to Troy-Bilt, and a thumbs up to Lowes.

I don’t know what I will buy now, but I do know what it won’t be. Perhaps I will look for another Echo brand.

Preparing for 3rd World Status — Pt 1

Sunday, March 29th, 2009

As the economy continues to falter, we should be preparing ourselves with ways to deal with the consequences.  In other countries, economic crashes resulted in the sporadic loss of utilities, such as electric.  Most of us cannot think of living without electricity 24/7 on demand.  We expect that when we turn on the switch, the lights will come on.

Well, as someone who has endured many days without electric service during ice storms, I can say that it makes life interesting.  Many of us can heat with fireplaces, and we can use candles and lanterns for lights, and if we live in a place that has public water, we might have water or we might not.  But most of us country dwellers have no water without electricity.  We rely on electric pumps to extract water from our wells.  Living is extremely difficult without water, and so it is a priority.

In my part of the country, the water table is too far down and the well casing to small in diameter to drop a bucket down the hole and bring it up either.  In my case, my well is 250 feet deep.  So I purchased a deep well hand pump, which can pump water from several hundred feet below the ground.  Unlike the old time pumps which pull water up by creating a suction at the top of the well, a deep well hand pump pushes it up from the bottom. Suction pumps can lift water a maximum of about 30 feet on a good day.  This limit does not exist when the water is pushed up from the bottom.

The unit I purchased is called the Simple Pump, and is basically produced by two guys (machinists) in a small shop.  They have sold hundreds of these pumps all over the world, and seem to have their engineering perfected.  The system consists of stainless steel pump unit slightly less than 2 inches in diameter, which is suspended in the well by pvc drop pipe connected to a stainless steel unit at the top of the well with the hand lever for pumping water.  A fiberglass rod extends down the drop pipe to provide the mechanical action necessary for pumping water.

The pump is small enough that it will fit beside an electric submersible pump in the well.

Here is the really cool part though.  The pump has garden hose threads at the output of the pump, and the pump has a oneway valve.  The hose can then be connected to an outside water faucet, and the hand pump used to pressurize the well tank inside the house.  Then the water pumped up by hand can be taken directly from the faucets inside the house.  No need to carry  buckets of water.

I will be installing this pump in a few days with the help of my plumber.  When it is finished, I will post a picture, and describe the installation.

Got Water?

Ok, I’ll Admit It, I’m Hooked!

Tuesday, March 3rd, 2009

I’ve never been much for games.  In my entire life, I have not watched a complete football game, or basketball game either.  I don’t get much fun out of playing cards, or party games.  The only game on my iMac is Mahjong.  So, it surprised me how much fun the Wii can be.

My wife asked for one for Christmas, but I couldn’t find any for sale.  So, when the demand let up after Christmas, I found one at my local Best Buy store, and bought it along with a Wii Fit.  I can’t believe how much fun it is!

So far, I have logged over 20 hours of Wii Fit credits in the first month, and I have to admit; I feel better.  My wife has logged over 10 hours herself on the Fit.  The team that invented Wii Fit, and the balance board did a great job.  I mostly do the Aerobics and some of the Balance games because thats what I think will help me most (being ah-hem overweight).

As I understand it, the idea for the Balance Board came from Sumo Wrestlers.  Sumo Wrestlers are so heavy, they have to weigh themselves by standing with each foot on a different scale, and then adding up the readings.  Nintendo thought way outside the box on this one.

The sports pack that comes with the Wii is also a blast.  We are especially fond of Golf and Bowling, but all the games are fun.  The only one who doesn’t like them is our dog, who seems to feel left out.

Last week, we bought We Ski, and it is one complex game.  Computer games have come a long way since the days of ‘Pong’!

I have to issue a word of warning though.  If you don’t want to suck up a lot of time; don’t buy a Wii.  I find it impossible to stay away from it.

Well done Nintendo!!

Rosetta Stone – My Impressions.

Friday, January 2nd, 2009

I decided I would like to learn a new language.  My goal is simply to learn it for the sake of learning it, and to exercise my tired old brain.  Learning new things is the best way to keep the mind working at its top potential.

I selected Mandarin, and ordered Rosetta Stone directly from the company. Having tried to learn other languages when I was in school, I was anxious to try the “Immersion Method” which Rosetta Stone uses. Languages were not my strong suit during my college days.

The lessons are configurable according to whether you want to learn speaking and listening, reading and writing, or both.  The reading and writing lessons allow the choice of Traditional Chinese, Simplified Chinese, or Hanyu Pinyin characters.  I chose Pinyin, and selected only speaking and listening lessons. I doubt there is enough years left in my life to learn the chinese characters.

I installed RS (Rosetta Stone) on a laptop, and setup two accounts; one for me, and another for my wife. I also invested in a pair of Plantronics gaming headsets with microphones so that both of us could hear the lessons together. We had to purchase an audio splitter to do this; and we only plug in one of the headset microphones at a time.

The lessons consist mainly of RS speaking phrases and sentences while showing a set of pictures. The language is presented both as spoken and written words. The student learns the meaning of the words and phrases by matching up the words with the pictures. Nowhere is the meaning of any word actually presented though.

I bought several Chinese dictionaries to assist in my learning experience, and one of the things that puzzle me is that RS presents words which are not in any of the dictionaries. For instance, in the sentence “Ta shi cong zhong guo lai de”, Neither ‘lai de’ nor ‘laide’ appears in a Chinese dictionary. The sentence says: “He is from China”; at least from my understanding of the lesson, but the exact meaning of ‘lai de’ escapes me so far.

Another problem is that the written Pinyin is often broken into syllables which leaves the student without clue as to which and how many syllables make up an entire word which can be found in a dictionary. Perhaps this is because Chinese graphic characters represent syllables and not necessarily words.

RS language courses are broken up into levels, which are subdivided into Units, which are further divided into Lessons. There are core lessons which present the vocabulary and grammar, and then shorter lessons which drill vocabulary, pronunciation, reading, writing, and grammar skills. Core lessons are generally about 45 minutes in length, and the other lessons are 10 to 15 minutes.

Periodically, RS will interrupt the students progression, and present a review of an earlier lesson. This is a very good feature, as it is very easy to forget something learned earlier when it is not being constantly used. I have also found that it is worthwhile to go back and redo the core lessons on my own from time to time.

There are several bugs in the RS software which I have discovered. One is that a review lesson keeps repeating until the RS program is terminated and restarted. Another is that the pronunciation lessons (at least for Mandarin) are presented in Chinese graphic characters with no option to use Pinyin even though Pinyin is chosen for the other lessons.

Overall, I think that Rosetta Stone is an excellent way to learn the fundamentals of a new language. I doubt I will ever have an extensive Chinese vocabulary from the RS lessons alone, but If I had to one day live within the Chinese culture, I would have a very good start.

Although there are several small problems with the RS software, I recommend the program if you seriously want to learn a new language on your own. I only wish it had been available 40 years ago.

Ford Escape Hybrid Review

Sunday, April 20th, 2008

After owning a Honda Civic Hybrid for two years, I decided to add another Hybrid to the stable. Here in the north east part of Pennsylvania, a four wheel drive vehicle of some sort is a necessity if a person needs to get around in the winter. Previously I had a standard Ford Escape to drive on those wintry days when the Honda just wasn’t up to the task. So what better choice than the Ford Escape Hybrid?

I ordered mine in mid October 2007 from the local Ford dealer which I had very favorable dealings with in the past (Ray Price Ford in Mt. Pocono PA). At the time, the estimated delivery time from the plant in Kansas was 8 weeks. I thought that was a long time considering the faltering economy and lackluster car sales, but little did I know!.

Eight weeks came and went, and I asked the dealer when I would get the car. He informed me that the delivery time now was out to 6 months! That was a real shock, and the justification given was that there is a battery shortage. I thought about canceling my order at that point, but upon reflection, I figured I could do no better elsewhere unless I was willing to drive hundreds of miles. I left the order stand.

My Hybrid Escape was delivered the second week of April, and I believe it was well worth the wait, especially considering the $3.50+ price of gasoline at the time.

Functionally, the Escape Hybrid looks just like a normal Escape with two minor exceptions. It has an air vent behind the left passenger window to allow for cooling of the Hybrid battery pack, and it has Hybrid badges added. The interior is the same also, except for a few inches less cargo width behind the rear seats, and there is no storage area under the rear floor. The Hybrid battery occupies that space.

Physically, the car is very comfortable for my 270 pound 6 foot 2 inch frame to drive. The ergonomics seem almost perfect except for the placement of the display selection and reset buttons which are under the steering wheel. My Escape has controls for the sound system built into the steering wheel, a feature earlier models lacked, and I find very convenient.

Driving the Hybrid is a familiar yet strangely different experience. The controls are the same as almost any other vehicle, yet they don’t always do the expected. For instance, the brake pedal sometimes causes the engine to stop. It always slows down the car, but it also tells the car’s computer that maybe the engine isn’t needed for a while. Sometimes, the gas pedal doesn’t rev up the engine, it just moves the car forward or back in a Hybrid driver’s favorite mode, all electric. However it does it, it is certainly effective, as my all wheel drive Escape managed an impressive 32 mpg on its first tank of fuel mostly on 8 to 10 mile trips, and an amazing 34.8 mpg driving from Stroudsburg PA to Camp Hill PA. Compare this to 19 mpg in my ’05 regular Escape. Many Escape Hybrid owners report better fuel mileage than the EPA ratings state, and it looks like mine is going to outperform the EPA also. Its always fun to pass a gas station!

On my first trip into town, the car managed a mile stretch solely on battery power. It may have gone further, but I arrived at my destination, so I don’t know. It is fairly easy to achieve all electric mode at 30 mph or less, as long as the driver does not have a ‘lead foot’. Whether that actually increases the gas mileage or not is still up in the air for me. From the standpoint of pure physics, it should not, as the batteries must eventually be recharged, and the batteries are less than 100% efficient at converting electrical input into stored energy. Since the charging current inevitably comes from the gas tank, the increased mileage of in-town driving comes at the expense of highway mileage.

The Escape’s high voltage generator creates a high pitch whine that is just barely audible in the cabin, and sounds like a distant fire siren. This was slightly unnerving at first, but now I don’t notice it.

Unlike my other SUVs that I owned, this one does not allow the driver to pop the transmission into neutral when going down hills. This was a fuel saving maneuver in my previous 4 wheelers, but the Escape Hybrid locks the driver out of neutral. This lock can be overridden, but there seems to be no advantage to doing it.

There is an ‘L’ gear that the driver can shift into, but its not really low at all, it just provides braking effect by generating electricity for the battery pack.  This does seem to increase the gas mileage a bit when doing a lot of stop and go driving by recapturing more of the energy lost during the braking phase.  I think of ‘D’ and ‘L’ as ‘Distant’ and ‘Local’ driving.

Actually, the Escape technically does not have a transmission like normal cars, it has a power splitting planetary drive almost like that used in the Toyota Prius.

Did I mention that the US Government allows a tax credit of $2200 for 2008? Some states also give a rebate for buying certain Hybrid models. In Pennsylvania,, the rebate is $500, and these rebates offset much of the extra cost of the Hybrid models. Its a win-win all around.

All in all, I am very pleased with Ford’s Hybrid SUV. Its just hard to argue with 32 mpg in a big comfortable and useful auto. Order it now, the delivery times probably won’t get shorter any time soon. Oh, you might find one for immediate delivery on eBay if you are willing to drive a couple hundred miles to pick it up.