18 Questions
Determination of extent of peripheral visual field and thereby diagnosis of blindness in specific portions of retina, is called ______.
perimetry
Optic disc produces physiological ______ (blind spot) in 15 degrees lateral to central point of vision in perimetry chart.
scotoma
Binocular vision provides detection of ______ and three-dimensional appearance of object in front of eyes.
distance
Field of vision is ______ that is seen by an eye at a given instant.
area
Field of vision has ______ and temporal division.
nasal
Final visual image is formed in ______.
visual cortex
The principle focal distance (Focal length) is the distance between the lens and the ______ point.
focal
Diopters are used to measure the refractive power of a lens in ______.
meters
The human eye has a refractive power of 6 m at ______.
rest
The total refractive power of the eye is about 59 D: - Cornea = 40-45 D - Lens = 15-20 D. The optics of the eye resemble those of a ______.
camera
The image that falls on the retina is real and inverted, as in a ______.
camera
Neural processing restores the upright appearance of the field of ______.
view
The ______ light reflex helps adaptation to changes in light intensity.
pupillary
When light is directed into one eye, the pupil of the other also ______.
constricts
The ______ reflex involves pupillary constriction, contraction of ciliary muscles and convergence of the eyeballs.
accommodation
Visual acuity is sharpest within the ______ region of the retina.
foveal
The ______ chart is used to measure visual acuity.
Snellen
______ vision is the degree to which details and contours of objects are perceived.
Binocular
Test your knowledge on visual acuity, field of vision, and the factors affecting distance vision clarity. Learn about terms such as 20/20 vision and how they are measured. Understand the significance of peripheral visual field in detecting blindness.
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