Night Blindness Treatment Services

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Night blindness, also called nyctalopia, is a symptom of several different diseases or conditions. All of thepossible causes of night blindness are associated with the way in which the eye receives light rays. Lighttravels through the cornea and lens and lands on the retina at the backof the eye. The retina is composed ofphotoreceptors. Photoreceptors are specialized nerve cells that receive light rays and convert them intoelectrical signals, which are then transmitted to the brain, creating an image.There are two types of photoreceptors, rods and cones. There are three million cones and 100 million rodsin each eye. The two different photoreceptors are similar in structure, however, rods have a larger outersegment than cones. The outer segments of photoreceptors contain light-sensitive photopigments whichchange shape whenever light rays strike them. Rods contain the photopigments retinal and rhodopsin, whereas cones contain retinal and three different opsins. Rhodopsin is only able to discriminate betweendifferent degrees of light intensity, whereas the opsins of cones distinguish between light wavelengths inthe red, blue, and green ranges. Hence, rods see only black and white, but cones see colors. Also, rodsenable the eyes to detect motion and provide peripheral vision.Rodsare responsible for vision in dim light, and cones are responsible for vision in bright light. The rodsare spread throughout the retina, but the cones are only in the center of the retina. Vision in dim light ordarkness is blurry because of the connections between the photoreceptors and the nerve cells which arelinked to the brain. Each rod must share this connection to the brain with several other rods so the braindoes not know exactly which rod produced the signal. Alternatively, vision in bright light is sharp becauseeach cone has its own connection to the brain so the brain can determine exactly where on the retina thesignal originated.Another feature of rods is that they must adapt to darkness. This is best exemplified by walking into a darkmovie theater. At first, one can see very little. With time, vision improves and one is able to discernobjects. Ultimately, one can see moderately well. This dark adaptation process occurs because of thechemical nature of rhodopsin. Rhodopsin is decomposedin bright light making the rods nonfunctional. Indarkness, rhodopsin is regenerated faster than it can be decomposed. Dark adaptation takes about 15–30minutes and, when complete, increases light sensitivity by about 100, 000 times.

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Bhagwan Sri Jambeshwar Jain Herbal Medicines

Sukravarpet, Coimbatore, Tamil Nadu
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Night blindness, also called nyctalopia, is a symptom of several different diseases or conditions. All of thepossible causes of night blindness are associated with the way in which the eye receives light rays. Lighttravels through the cornea and lens and lands on the retina at the backof the eye. The retina is composed ofphotoreceptors. Photoreceptors are specialized nerve cells that receive light rays and convert them intoelectrical signals, which are then transmitted to the brain, creating an image.There are two types of photoreceptors, rods and cones. There are three million cones and 100 million rodsin each eye. The two different photoreceptors are similar in structure, however, rods have a larger outersegment than cones. The outer segments of photoreceptors contain light-sensitive photopigments whichchange shape whenever light rays strike them. Rods contain the photopigments retinal and rhodopsin,whereas cones contain retinal and three different opsins. Rhodopsin is only able to discriminate betweendifferent degrees of light intensity, whereas the opsins of cones distinguish between light wavelengths inthe red, blue, and green ranges. Hence, rods see only black and white, but cones see colors. Also, rodsenable the eyes to detect motion and provide peripheral vision.Rodsare responsible for vision in dim light, and cones are responsible for vision in bright light. The rodsare spread throughout the retina, but the cones are only in the center of the retina. Vision in dim light ordarkness is blurry because of the connections between the photoreceptors and the nerve cells which arelinked to the brain. Each rod must share this connection to the brain with several other rods so the braindoes not know exactly which rod produced the signal. Alternatively, vision in bright light is sharp becauseeach cone has its own connection to the brain so the brain can determine exactly where on the retina thesignal originated.Another feature of rods is that they must adapt to darkness. This is best exemplified by walking into a darkmovie theater. At first, one can see very little. With time, vision improves and one is able to discernobjects. Ultimately, one can see moderately well. This dark adaptation process occurs because of thechemical nature of rhodopsin. Rhodopsin is decomposedin bright light making the rods nonfunctional. Indarkness, rhodopsin is regenerated faster than it can be decomposed. Dark adaptation takes about 15–30minutes and, when complete, increases light sensitivity by about 100,000 times.
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Night Blindness Treatment Services

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Nature of BusinessWholesaler
Annual TurnoverRs. 50 Lakh - 1 Crore
IndiaMART Member SinceApr 2013
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Sandeep Kumar

No. 190, Near Indian Bank
Sukravarpet
Coimbatore - 641001, Tamil Nadu, India

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