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There are two basic types of astigmatism; myopia and hyperopia. These two types affect up to one third of the population and can be treated in a variety of ways from corrective lenses to surgery.
Myopia, or nearsightedness occurs when the eyeball is slightly longer than usual from front to back or the shape of the cornea is too steep. This causes the light entering the eye to come to a...
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Presbyopia is an age related condition that effects your ability to focus clearly on near objects like printed text, computer screens and photographs. It primarily affects people over the age of 40 and is not a disease.
When light from a close object enters the eye it naturally comes to focus behind the retina. To focus the light properly the cilliary muscle around your lens contracts,...
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Age-related Macular Degeneration or AMD is a disease that causes a slow and painless loss of central vision. Central vision is what you use when you look straight at an object; it allows you to see fine detail needed when reading or driving.
On the inside of the eye is the retina, which contains over 120 million light sensitive cells or photoreceptors. The largest concentration of...
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An intraocular lens, or I-O-L, is the artificial lens implant that replaces the eye’s natural lens after cataract surgery. Recent advancements in lens technology have made it possible to not only treat the cataract, but to reduce or eliminate dependence on glasses as well. In most cases the patients have reported having the best vision of their lives.
Since no single lens works for...
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- Written by Harbor View Eye Care Team
A refractive error occurs when light is not focused properly on the retina at the back of the eye.
The curved surface of the eyeball bends light, much like a magnifying glass. This is called refraction. As the light is refracted it should focus on the retina, which lines the back surface of the eye.
Light enters your eye through two curved surfaces. First it passes through the cornea...
