NEET2020BotanyEnvironmental IssuesActual
Snow-blindness in Antarctic region is due to
Options
- AInflammation of cornea due to high dose of UV-B radiation
- BHigh reflection of light from snow
- CDamage to retina caused by infra-red rays
- DFreezing of fluids in the eye by low temperature
Correct answer
A. Inflammation of cornea due to high dose of UV-B radiation
Step-by-step solution
If the ozone layer is intact, the harmful UV-B radiation is completely absorbed by the Earth's atmosphere. UV-B causes mutation and damages DNA. It causes aging and damage to the skin and various kinds of skin cancer. In the human eye, the cornea absorbs UV-B radiation, and a higher high dose of UV-B causes inflammation of the cornea and may cause permanent damage to it. This is called snow-blindness.