The ability of the eye to determine the crispness of the image against its background is known as contrast sensitivity. It is a measure of how well an individual can perceive differences in luminance or color of the adjacent areas of an image. It is an important aspect of visual functions because it is also…
Why we get with and against reflex movements in retinoscopy? Wither of this scenario depicts the ametropic conditions of the eye which are needed to be given right prescription for the refraction. What is a Retinoscope? Retinoscope is an instrument which is useful for the objective refraction of the patient. This instrument helps in determining…
Accommodative esotropia is the phenomenon of over convergence in response to neurologic stimulus that demands accommodation to see clearly at distance, intermediate and near point. Linkage of accommodation and convergence We can induce convergence without stimulating accommodation with the help of base out prisms; but we need to stimulate convergence before stimulating accommodation. The accommodation…
The eye as a whole is the visual organ of the body that helps us see the world and understand the happenings in a better way by using this sense of body. The different parts of the eye have some different functions as well that add to the sensory function of the eye. Eyelid Eyelid…
Our color vision is our response to wavelengths. Before understanding trichromatic theory of color vision, let’s make things more understanding. What is color? Is this light? Is this present in objects? Consider you hold a single color piece of cloth. It is of green color. Is light reflected by the cloth is green? Well the…
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