It is indeed quite possible to have both nearsightedness and farsightedness in the same eye, and at the same time. While this sounds strange, it is quite common -but it does matter how you are using the term "farsighted." Nearsightedness (myopia) is where...
Continue ReadingPeople often get confused about measuring vision when they try to compare their glasses prescription with some distance visual acuity measurement on a Snellen type eye chart. It would be nice if there were a corresponding Snellen letter acuity for...
Continue ReadingMyopia, called "nearsightedness" in the U.S. and "short sight" in the U.K., is where you cannot see the distance in good focus but can see up close just fine without glasses or contact lenses. In most cases, it is caused anatomically by an eyeball that has grown to a...
Continue ReadingIt may not be dangerous, but it is definitely not normal. Called "monocular diplopia," its appearance after LASIK without its fading away indicates there is a problem. It could be due to a wrinkle in the LASIK flap (called "striae") or could indicate there is still...
Continue ReadingYes, definitely. The limits to LASIK and many of its risks are directly related to how high a prescription (the refractive error) you need to treat. Laser Vision Correction is generally best for low to moderate degrees of nearsightedness (myopia) and astigmatism. In my...
Continue ReadingI assume you mean to get an otherwise equivalent glasses Rx, but without any astigmatism correction? If so, yes, it is quite easy to determine the "spherical equivalent" Rx. You take ½ the amount of cylinder (astigmatism correction) and add it to the spherical component...
Continue ReadingLASIK works by thinning and flattening the cornea, the clear dome overlying the pupil and iris. The amount of corneal thinning is proportional to the degree of nearsightedness (myopia) being treated. When one is trying to treat such a high prescription as -14 diopters,...
Continue ReadingYou should make an appointment with a good eye doctor who will dilate your eyes. They will want to carefully examine your retina to make sure there are no holes, tears, or weak areas. These could potentially be the source of the floaters and would probably be treated at...
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