HBS 2.4 Key Terms Word Scramble
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Term | Definition |
Accommodation | the automatic adjustment of the eye for seeing at different distances affected chiefly by changes in the convexity or the crystalline lens |
Astigmatism | a defect of an optical system causing rays from a point to fail to meet a focal point resulting in a blurred and imperfect image |
blind spot | the small circular area in the retina where the optic nerve enters the eye that is devoid of rods and cones and is insensitive to light |
cone | any of the conical photosensitive receptor cells of the vertebrate retina that function in color vision |
cornea | the transparent part of the coat of the eyeball that covers the iris and pupil and admits light to the interior |
Depth perception | the ability to judge the distance of objects and the spatial relationship of objects at different distances |
Hyperopia | a condition in which visual images come to a focus behind the retina of the eye and vision is better for distant than for near objects (can't see close objects well) |
iris | the opaque muscular contractile diaphragm that is suspended in the aqueous humor in front of the lens of the eye, is perforated by the pupil and is continuous peripherally with the ciliary body, has a deeply pigmented posterior surface which excludes the |
Myopia | a condition in which the visual images come to a focus in front of the retina of the eye because of defects in the refractive media of the eye or of abnormal length of the eyeball resulting especially in defective vision of distant objects |
optic nerve | transmits visual information from retina to the brain |
pupil | the opening in the iris, which admits light into the interior of the vertebrate eye |
Refraction | the deflection from a straight path undergone by a light or a wave of energy in passing obliquely from one medium into another in which its velocity is different |
rod | any of the long rod-shaped photosensitive receptors in the retina responsive to faint light |
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