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If the light source in front of an eye becomes bright suddenly
In response to sudden bright light, pupil constricts by the constriction of sphinctor pupillae muscles through parasympathetic nervous system, in order to protect retina from possible injury against bright light.
Ear drum is know as
Ear drum is also known as tympanic membrane which separates middle ear from external ear.
Our ear can hear the frequency of sound waves
These are called the limits of audibility. Actual value is 20 to 20000 cycles/sec.
In the myopia eye defect, the rays of light
Myopia is near sightedness. In this defect, the light rays converge in front of retina causing a blurred image.
The human eye is sensitive only to light having wave length ranging from
The potential difference between outside and inside of a nerve before excitation is known as
Bipolar neurons occur in
Which of the following disorder of eyes caused by UV radiations?
In mammalian eye, the power of accomodation is controlled by changing the shape of the lens. It is governed by
Ciliary body contains a smooth muscle called ciliary muscle in the eye. Ciliary muscle alters the shape of lens for near or far vision. This mechanism is called accomodation.
The rods and cones of the eye retinal layer are modified