Doctor insights on:
No: people who are nearsighted can often read quite well without their glasses on. Their reading vision actually gets worse when they wear their distance glasses when they try to read. This typically happens when they get into their mid-40s. They develop a loss of focusing power up close called presbyopia (happens to everyone). ...Read more
Astigmatism correctn: Absolutely. The vast majority of corneal refractive surgery, i.e. Lasik or surface ablation/prk, is for just that. Most people wearing glasses for distance vision are myopic, and most of them have some amount of astigmatism as well. Today's lasers can correct a very high proportion of your myopia and your astigmatism. Some lasik surgeons give free educational appointments or seminars. ...Read more
Nearsightedness is a recessive trait. red-green color blindness is a sex-linked recessive trait, what does this mean?
An Autosomal: Recessive disorder: Both parents are unaffected carriers of a mutant gene. Each of their children has a 25% chance of inheriting the mutant gene from both & having the disorder. X-linked recessive: Mom carries a defective gene on one of her X chromosomes. Each son has a 50% chance of inheriting the X chromosome with the mutant gene & having the disorder; each daughter, 50% of being a carrier. ...Read more
Had a big increase in floaters 1 yr. Ago. Bothers me most reading/keyboarding. Nearsighted with bifocal contacts. Suggests to treat or live with it?
Aspheric glasses: Aspheric glasses may minimize induction of aberrations in nearsighted people but usually not to a clinically significant degree. That being said you are better off spending your money on high index glass to minimize the thickness and weight of your glasses. Contact lenses are also a very good option. ...Read more
Maybe,maybe not: Ambliopia (lazy eye) is the process where the brain ignores the "camera" picture from one eye because it is less clear or causes double vision. It can sometimes be improved if the weaker eye is strengthened (glasses), the stronger eye is patched or if the eye is lined up better with surgery. If the process has gone on too long, the brain ignores the fix & surgery is simply cosmetic. ...Read more
I've heard there are certain habits that worsen the degree of myopia (nearsightedness). What are these habits and what I do do decrease the degree?
Yes: Nearsighted eyeglass (or contact) correction will be denoted on the prescription as a (-) power and a number (e.g. -2.75) which would be a nearsighted person with a power of minus 2.75 diopters. ...Read more
Mostly: Ortho k is a systemic of molding mildly myopic eyes to correct the vision by wearing a series of too flat hard lenses which push the center of the eye inwards. It is a tradeoff since to maintain any improvement, you have to wear a "keeper" lens at night. It was developed as a way to keep non-professionals like optometrists in the vision correction game. It reverses when you stop the lenses. ...Read more
Both: Ortho-k is an expensive and non-sensible treatment. With this, you wear contact lenses while you sleep that mould the cornea. This allows better vision. During the day, the cornea reshapes itself to normal. What this means is that you see well for a few hours and your vision fades as the day progresses. A more sensible and cheaper solution is to wear contact lenses during the day. ...Read more
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