Astigmatism

Q.

In an astigmatic eye, the shape of cornea is ___. This defect is corrected using a ___ lens.

1. oval, cylindrical
2. spherical, cylindrical
3. Spherical, convex
4. oval, convex

Q. A person cannot see the lines drawn parallel to each other clearly. He is suffering from _________.

1. Presbyopia
2. Astigmatism
3. Myopia
4. Hypermetropia

Q. Astigmatism is corrected usinglenses.

1. cylindrical
2. bifocal
3. translucent
4. convex

Q. Write true or false for the following statements :
To correct astigmatism we use cylindrical lens.

1. True
2. False

Q. What is astigmatism? How is it caused? How is it corrected? (OR)
What is astigmatism and how is this vision defect counteracted?

Q. What do you understand by presbyopia and astigmatism?

Q. The disease of astigmatism in human eye is because of:

1. unequal and uneven curvature of eye lens
2. eye lens being of organic matter
3. eye membranes being thick
4. opacity development in eye lens

Q. Cylindrical lenses are used in case of

1. Myopia
2. Presbyopia
3. Astigmatism
4. Hypermetropia

Q. A person cannot see the lines drawn parallel to each other clearly. He is suffering from _________.

1. Myopia
2. Astigmatism
3. Hypermetropia
4. Presbyopia

Q.

In an astigmatic eye, the shape of cornea is ___. This defect is corrected using a ___ lens.

1. Spherical, convex
2. oval, convex
3. oval, cylindrical
4. spherical, cylindrical