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Contact lens exam is a part of your eye exam. once you need contact lenses, you need to get your eye checked and get your prescription including diameter for your contact lens.
Yes, too great stress can sometimes lead to temporary color blindness. Human beings' eyes distinguish different colors by photoreceptors which are on the retina at the back of eye balls. There are two kinds of photoreceptors, rods and cones. The function of rods is to fill the peripheral edges of the retina and the rods only come into power when people are in the conditions of low light. So rods can help people see in darkness, therefore, they do not distinguish color very much. Cones are throughout the retina and they have in themselves pigments that are responsive to some colors. When people see a certain kind of color, the related pigments will respond to the brain so people will know what color it is. The cause of color blindness is that cones misinterpreting the wavelengths of the light coming into the retina so that the pigments wrongly respond to their brain. Certain damages or diseases and aging to eyes will cause color blindness. When people are getting old, the sensitivity of cones to colors will weaken because of macular degeneration, cataracts and so on and so forth.
Referring to your question, actually, if your kids are new to wear the eyeglasses, then he/she will not get used to that very quickly, let along in PE class. So here is my suggestion, you can buy him a pair of goggles which particularly use to having PE classes or you can tell your kids' inconvenience to his PE teacher then the teacher will pay more attention to take care of him. I do not suggest your kids to do any kind of eye surgery because his eyes are still under development. Hope this helpful.
I often have such problem. It usually happens when I wake up or stand up suddenly. My doctor said it was because Low blood pressure or Low blood sugar. You may see the doctor to find the real cause.
You can consult your eye doctors to see whether he or she can give your some reliable suggestions because he or she has met so many patients. They may know a good way to improve your eyesight. Don't trust any eye exercise that will charge you. There is no scientific proof for these eye excercises. So I think they are not trust worthy.
Usually gallbladder surgery won't cause bloodshot in eyes directly. Gallbladder surgery might leave patient with side effects like pain, diarrhea, breathing difficulty or bile duct injury. For the first week, the patient might experience serious discomfort and pain, because the internal organs are shifted or the carbon dioxide gas left in abdomen. Within 2-3 weeks after this surgery, patient might develop diarrhea due to frequent movement of bowel and bad digestion. As to bile duct injury, nearly 1 in 5 patients who took this surgery is affected. It is common as well as serious, which requires another surgery to fix. Yet there seems no clue between bloodshot in eyes and gallbladder surgery. There are too many causes of bloodshot eyes. You might get it for weight lifting, dryness of eyes, allergies and eye strain and so on. It is really a small problem, because the bloodshot usually clears out soon, even with no treatment. If you still feels bad, I suggest you do some saline solution compress on eyes, which might make you feel better, and give your eyes some time to have a rest, and also wash eyes out of irritants and lubricate eyes. Hope this could be helpful.
The simplest, cheapest and safest way to correct short-sightedness is with glasses. Concave prescription lenses (called minus lenses) are used to bend light rays slightly outwards. The light rays then have a greater angle to bend back to focus when travelling through the cornea and lens. As a result, the light rays focus further back - on the retina. There is an enormous choice of glasses frames available, to suit all budgets. Glasses are seen as more acceptable these days, and younger people may even regard them as a fashion accessory.
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Well, in fact, there are a lot of reusable contact lense with colors. Generally speaking, their duration differ from one another, some is half a year, some is three months, it all depends. As to the safety, I gotta say, it is unknown. Because it is reported that some people get infected eyes due to a lack of proper use and cleaning. So, you have to pay a lot of attention if you want to wear them.
What kind of vision problem do you have? I think you'd better have an eye exam first. Then the doctor will suggest which kind of glasses you need. Eyeglasses can help correct our vison problems. They won't damage or worsen your vision.
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