Question

ng passage carefully: Cataract is opacity in the lens of eye. The normal lens allows light to reachthe retina, when it becomes opaque and does not allow light to reach theretina, we are unable to see clearly, Today modern medical advances havemade cataract surgery very successful. New surgical techniques and intraocularlenses can restore excellent vision in 97 percent of all cases. In the 1960s, DrCharles Kelman from U.S. started a technique called Phacoemulsification inwhich cataract was removed through minute incision. Then in 1988, Dr. Amar Agarwal from India started a technique called phacoemulsification in which cataracts wereremoved through a 3 mm opening. In 2001, a special lens was made whichwent through a small opening of one to 1.5 mm. This was called the Rollableintraocular lens. The causes for cataract formation are not fully known. It is basically anaging phenomenon. Next to old age are other factors like deficiency of foodlike proteins and vitamins, some toxic drugs, general diseases like diabetes, infections and injuries. To delay the onset of cataract, one should takenourishing diet rich in proteins and vitamins. Food such as liver, eggs, milkproducts, carrots,cabbages and yeast are good. One must protect eyes fromexcessive exposure to sunrays, X-rays, intense heat and injuries. Disease suchas diabetes and syphilis should be treated early and effectively. There is no medical treatment for cataract. The only treatment is surgery. Once the cataract is removed, the eye is unable to focus, as there is no lens. Soone has to use an artificial lens. This can either be pair of spectacles, contactlens or an intraocular lens. Spectacles can be used as they are cheap and withinthe reach of the common man. But these are very heavy and not comfortable. Further, if one removes them the person is blind. Other disadvantages are thateverything is magnified and the side view is very poor The second alternative is to use the contact lens. This is an artificial lensplaced on the eye. Unlike spectacles they do not leave any lasting marks nordoes the wearer have the stigma of spectacles attached to his personality.Besides, they can be used according to the convenience of the person. Thedisadvantage, as with spectacles, is that when it is removed the person is blind. Another problem is that they have to be put on in the morning and removedat night, which is difficult for an old person. So, the best method s to give thepatient an intraocular lens. This is an artificial lens in the eye placed duringsurgery, It will remain in place till the end of life. This lens does not irritatethe eye.
1) It is the _enables us to see.
a) Lens of the eye
b) Retina that
c) Retina which receives light from the lens of the eye,and
d)Opaqueness of the retina that ​

Answer 1

Answer:

c  is ANS

Explanation:

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