Re: A question about EYES
The rods age at a differetn rate than the cones. You lose your night vision at an earlier age than you day vision. There is a very good article on this but it is copy protected so I can't lift it.
Here is acouple of more pieces of information. This whole question has been very interesting to me being as I myself am having trouble as soon as the sun goes down. I think I am going to have to shell out the big bucks for the big 56 mm objectives.
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Making Night Driving Safer
For many drivers, vision is affected significantly by darkness. A driver with 20/20 vision during the day can experience a reduction of visual acuity to 20/40 at night. In fact, approximately one out of ten drivers actually needs special night driving glasses.
Darkness also restricts side vision and alters depth perception, which affects all drivers. Therefore, all drivers, even those who dont need special night driving glasses, can make night driving safer by heeding these tips from the Pennsylvania Optometric Association:
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Q: I am 58 years old. My last examination showed my eyesight has improved dramatically. What would be the reason for this? B.C., Virginia
A: You don't say if you are nearsighted or farsighted. If you are nearsighted, it is really common for nearsightedness to decrease (get better) in the 50s and 60s. If you are farsighted, there are several medical conditions that can cause a dramatic decrease in prescription, including cataracts and diabetes. Please ask your eye doctor to explain why your eyes changed in this manner. It's probably normal aging (what an awful concept!). Dr. Dubow
Q: How can I improve my night vision? Jamie, Montana
A: Good night vision is partly hereditary. But you can do several things to have better night vision.
First of all, make sure you have your eyes checked on a regular basis (I recommend yearly), and wear your distance prescription at night. People tend to be more nearsighted at night because there is very little to focus on far away, so your glasses or contact lenses actually do more for your vision at night than during the day.
Second, if you wear glasses, make sure you have an antireflection coating on your lenses. This helps cut down on glare and really improves your ability to see at night.
Third, eat a good diet with lots of fruits and vegetables. Even though your mom always told you to do this, it is not a myth! A good diet can help you see better. And carrots are not the only food that you should think about. Current research shows that dark green leafy vegetables, like spinach, kale, or collard greens, are very helpful in maintaining healthy eyes and good vision. Dr. Dubow
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