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Refractive Lens Exchange (also known as PreLex®, Clear Lens Exchange, et al.) is a primarily Refractive Surgical procedure that can reduce or eliminate Presbyopia, Myopia, Hyperopia, and Astigmatism. Quite similar to a cataract operation, the eye's natural lens is...

In a word...No. Keratoconus is one of the eye conditions that must be ruled out before LASIK can be safely done. The reason is because keratoconus is itself a weakness of corneal tissue that can cause nearsightedness (myopia) and astigmatism. If you try to thin and...

Myopic (near- or short-sighted) eyes are typically a larger diameter than "normal" eyeballs. The focusing parts of the front of the eye (cornea, natural lens, and pupil) do not "know" this, so they focus a distant object too soon inside the eye: the image is in front of...

The use of lasers in cataract/lens implant (IOL) surgery has a long and somewhat bumpy course. The first big breakthrough 35+ years ago was the use of high-frequency ultrasound to break up the hardened lens material of an aged natural lens, what we call a "cataract." Many...

photo credit: TalkSpace, Liz Campese We see with our eyes, right? Surprisingly perhaps, but the answer is "No." We see with our brain, the part with the most neuronal connections, by the way. The Occipital Cortex is dedicated to assembling the most useful virtual image...

The old story of a cataract needing to "ripen" before it could be safely treated surgically should be abandoned. Back when I began my Ophthalmology residency in the late 1970s, the shift to small incision surgery with lens implants was just beginning. Prior to that,...

People tend to think of the two eyes as separately operating video cameras that are sending parallel signals to the brain (more specifically: the occipital cortex). It may seem as if there are two little "vision gnomes" sitting next to each other at twin TV monitors...

LASIK does not correct Presbyopia. But LASIK can be used (as is often done with contact lenses) to "trick" the reading vision problem of middle age. This is an optical strategy called "Monovision." [Some people call this "blended vision."] Monovision involves...