Visual Conditions

Myopia

Myopia, more commonly known as nearsightedness, occurs when the curvature of the cornea is too steep. As a result, light rays entering the eye are focused in front of the retina. Ideally these light rays should focus on the back of the retina in a tight point. Approximately 25% of the U.S. and Canadian population have myopia. With myopia objects in the distance are blurry. The greater the degree of myopia, the blurrier the objects in the distance become. People with severe myopia may not see things clearly beyond 5 feet.

Hyperopia

Hyperopia, more commonly known as farsightedness, occurs when the curvature of the cornea is too flat. As a result, light rays entering the eye are focused behind the retina. Ideally these light rays should focus on the retina in a tight point. With hyperopia objects close up are blurry. The greater the degree of hyperopia, the blurrier the objects become. People with severe hyperopia find it difficult to see near and far objects.

Astigmatism

Astigmatism occurs when the curvature of the cornea is more similar to a football versus a soccer ball. As a result, light rays entering the eye are focused in two points on the retina. Ideally these light rays should focus on the back of the retina in a tight point. With astigmatism objects both in the distance or close up may appear to be blurry. The greater the degree of astigmatism, the blurrier the objects become. People with severe astigmatism find it difficult to wear contact lenses and may have to have expensive custom made contact lenses called Toric lenses to see properly and for comfort. Over 50% of people with myopia and hyperopia have astigmatism.

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