Ziemer Ophtalmology

Vision problems

The eye is often considered the most important sensory organ of the human body. Seventy percent of our sensory cells are located on the retina with the muscles that control eye movement considered to be the most active muscles in the human body.

Light enters the eye through the anterior (or front) part of the eye where it passes first through the cornea and then lens which focus the light into a distinct beam. This light beam then moves through the middle of the eye and ends up on the back of the eye (retina) which is compsed of a light-sensitive membrane that translates the light into electrical signals which are, in turn, sent to the brain through the optical nerve (Figure 1).

 
Myopia (nearsightedness)
Myopia (nearsightedness)

The curvature of the cornea and the lens are important factors in determining how well light is focused on the retina. However, not every cornea is shaped in a way that provides the best visual focus.

Methods to correct myopia include glasses, contact lenses and laser vision correction like the latest Z LASIK procedure. Discuss what kind of correction is right for you with your doctor. 

Myopia Vision

In myopic eyes the cornea and lens bend incoming light rays so they come into focus in front of the retina, rather than on it. Distant objects appear blurred.

Hyperopia (farsighteness)
Hyperopia (farsighteness)

Methods to correct myopia include glasses, contact lenses and laser vision correction like the latest Z LASIKprocedure. Discuss what kind of correction is right for you with your doctor.

 

Hyperopia Eye

In myopic eyes the cornea and lens bend incoming light rays so they come into focus in front of the retina, rather than on it. Distant objects appear blurred.

Astigmatism
Astigmatism

The curvature of the cornea and the lens are important factors in determining how well light is focused on the retina. However, not every cornea is shaped in a way that provides the best visual focus.

Astigmatism

The eye does not focus light evenly. In part of the field of view, the image will be focused while in another part, the image will be out of focus. Objects can appear distorted at any distance.