Yoga of Perfect Sight

Definitions

Normal vision: is perfect sight at all distances. The Snellen test card is the standard for testing vision. When the twenty feet line of the card can be read at twenty feet or further, and fine print can be read at six inches or less, one has normal vision.

Myopia or near-sightedness: The vision for near objects is good, while the distant vision is impaired.

Hypermetropia or far-sightedness: The sight is not so good at a near point as it is for more distant objects.

Presbyopia or old age sight: The vision is imperfect when the patient tries to read fine print at a near point. The distant vision may or may not be good.

Astigmatism: is an imperfect curvature of the eye. Usually the front part of the eye has a curve which is different from all the other curves.

Cataract: is an opacity of the lens in the pupils, which interferes with good vision.

Memory, or imagination, is the ability to see or recall letters or other objects, when the eyes are closed or open.

The Snellen test card: has letters printed in varying sizes. The smallest letter on the card is a measure of the vision.

Fine print: is one of the smallest types used in printing and helps to improve the vision if it is read every day.

Blinking: is a short and gentle movement of the eyelids.