H
HALF-EYE LENS
A lens for near vision only, similar in shape to a lower half lens. |
HARD CONTACT LENSES
Sometimes called “flexible”, these are generally made of a plastic material that contains silicon and fluorine, two elements that allow the eyes to breathe. |
HYPERMETROPIA
An abnormality of vision in which the image forms behind the retina rather than on it. In hypermetropia, vision for distant objects is good whereas vision for near objects is not as good or poor. It is the opposite of myopia. |
HYPERPHORIA
An abnormality in binocular balance. When binocular vision is dissociated, an individual eye’s line of sight deviates upwards. |
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