H52: Disorders of refraction and accommodation
H52.5: Disorders of accommodation
The cornea is located at the front of the eye. It is transparent and curved. The curvature focuses light in the eye. This is vital to be able to see clearly.
The lens of the eye is located behind the pupil. The pupil is a round hole in the iris. The lens of the eye is transparent and lens-shaped like a magnifying glass. It lies in a fixed, transparent capsule made of connective tissue. There is a muscle around the lens that holds the lens in place and can adjust its shape.
Rays of light enter the eye through the cornea and the lens. The image that you see then appears at the back of the eye on the retina. The light has to be focused just right for a person to see clearly.
The eye has to adjust to be able to see clearly at different distances. Your eyes cannot adjust to different distances sufficiently. You may find it more difficult to see properly as a result. The eye’s capacity to adjust may be reduced for various reasons. For example, the muscle around the lens may not function properly. The eye may also find it more difficult to adjust as a result of other conditions.
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