Which among the following types of lenses are prescribed by doctors for a patient suffering from astigmatism?
Correct answer: D. Cylindrical Lens
- A. Convex Lens
- B. Concave Lens
- C. Spherical Lens
- D. Cylindrical Lens
Explanation
Astigmatism results from unequal curvature in different directions of the cornea or lens, so a cylindrical lens corrects the differing focal powers. Ordinary spherical lenses cannot correct this directional distortion alone.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Human Body and Health
The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.
Practise Human Body and Health
588 free Human Body and Health MCQs from Everyday Science, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Everyday Science questions like this
Everyday Science is on 41 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Human Body and Health questions
Which of the following pairs belong to the category of cold blooded animals?
The human heart is _______ ?
What is the scientific name of flying fish ?
A doctor who specializes in diseases of the nose?
What animal has longest gestation period of about 640 to 660 days or 95 weeks of any land animal ?
Which of the following is the world's loudest bird ?