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How has cataract surgery changed in the last 20 years?

Cataract surgery has changed tremendously over the past 20 years or. And it is almost unrecognizable now when compared to how the operation was performed when I started my training over 40 years ago! Cataract surgery was originally an operation to remove the cloudy...

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What does a prescription with SPH=plano, CYL=-0.25, and AXIS=90 on both eyes mean?

It means your glasses are as close to plain window glass as it is possible to be. If these glasses were prescribed for protection from strong light (tinted) or if this was part of a progressive glasses Rx (with a bifocal section at the bottom for reading), this might make...

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Do I need surgery if I have eye floaters?

Probably not. "Floaters" are the out-of-focus silhouettes of the remnants of the liquefying vitreous. The vitreous body is a transparent gel that fills the eyeball. While it has purpose when we are young, it is mostly superfluous after childhood and so starts to fall...

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Can a nearsighted person become farsighted?

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...

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If a person has an -11 Diopter prescription for glasses, what is that in 20/20 vision… numbers?

People 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...

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What is the cause of nearsightedness (myopia)?

Myopia, 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...

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Is double-vision in one eye after LASIK dangerous?

It 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...

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Is there any limit (power range) for Lasik surgery for eye?

Yes, 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...

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