Normal Eye

The normal eye experienced clarity of vision because light rays pass through the cornea, pupil, and lens and focus directly on the retina. The desired target object reaches the retina. The desired target object reaches the retina in the proper location for sharp, clear and focused vision.

Myopia

Myopia, or nearsightedness, occurs when light rays are focused in front of the retina, instead of directly on the retina. This is normally caused when the cornea is too steep or the eye is too long.

Hyperopia

Hyperopia, of farsightedness, occurs when the eye does not have enough focusing power and light focuses behind the retina instead of on it. The eye is either too short or the cornea too flat.

Astigmatism

Astigmatism is an uneven curvature of the cornea that causes blurred vision. Different curves result in more than one focal point, and thus, distorted vision.