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Near Point:
14 to 16 inches or 35 to 40 centimeters.
Occlusion:
Obscuring the vision of an eye.
Peripheral Vision:
Ability to perceive the presence, motion, or color of objects outside the direct line of vision.
Phoria:
Root word denoting a latent deviation in which the eyes have a constant tendency to turn from the normal position for
binocular vision.
Photoptic:
Vision under bright lighting levels.
Potential Acuity:
A quick assessment of macular function in cataract patients and documents that surgery is expected to improve visual
performance.
Presbyopia:
Loss of accommodation so it is difficult to focus on near objects.
Refraction:
The bending of the rays of light. Sometimes used to refer to an examination for glasses or contact lenses.
Scotopic:
Vision at low light levels.
Stereopsis:
The ability to perceive depth.
Strabismus:
A muscle imbalance. Eyes turn inward or outward.
Suppression:
The non-use of vision in one eye.
Vision:
The ability to see and to interpret what is seen.
Visual acuity:
Vision of an eye or eyes.
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