The cornea is a transparent tissue in the front part of the eye. It is a curved spherical
structure that is responsible for focusing the light onto the inside of the eye. Contact
lenses sit on top of the cornea to change it's curvature and eliminate the need for
glasses. The Vision Correction Procedures discussed in this website attempt to improve
vision by changing the shape of the cornea.
The iris is the colored part of the eye. It opens up in dark rooms and at night to let
more light into the eye. Conversely, in bright lights the iris constricts to decrease the
amount of light that enters the back of the eye.
The pupil is the black spot in the center of the iris. Actually, the pupil is the name
given to the opening in the iris through which light passes.
The lens is responsible for helping to fine adjust the focus of the eye. The lens changes
shape to allow clear vision both in the distance and for reading.
The vitreous is a clear jelly-like material which fills the inside of the eyeball. Light
passes through the vitreous on it's way to being focused onto the retina.
The retina is a thin film of tissue (like film in a camera) where images are brought into
focus. The retina lines the inside surface of the eyeball. The retina is connected to the
brain where the visual signals are processed.
Between the cornea and the iris is a space called the anterior chamber. This space is
filled with a clear water-like solution.
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