quiz 2

Abnormal curvature of the cornea is called as __________.

• Regular Astigmatism

• Indexed astigmatism

• Corneal Astigmatism

• Lens Astigmatism

What is regular astigmatism?

• Change in refractive power from anterior to posterior

• Change in refractive power from one meridian to another meridian

• Change in refractive power from lens to cornea

• having same power in both meridian

What is with the rule astigmatism?

• Horizontal meridian is more curved than vertical meridian

• Vertical meridian is more curved than horizontal meridian

• Both meridians are at right angles to each other

• Both meridians are at no angles to each other

In hypermetropia parallel rays of light from infinity comes and focus ___________.

• in straight line with the retina

• behind the retina

• on the retina

• behind the lens

_____________ is corrected by normal physiological tone of the ciliary muscle.

• Manifested Hypermetropia

• Latent Hypermetropia

• Absolute Hypermetropia

• Astigmatism

In Index Hypermetropia, corneal refractive index is _____________

• less than 1.47

• more than+ 2.00

• less than 2.00

• less than 1.38

Due to ______________ at birth all new-borns will have hypermetropia. a. small eyeball size b. large eyeball size c. normal eyeball size

• small eyeball size

• large eyeball size

• normal eyeball size

• large axial lenght

Choose the causes for presbyopia:

• Appearance of grey hair

• Natural lens loses its flexibility

• rregular shape of the eyeball

• Irregular shape of the cornea

Similar to grey hair and wrinkles, presbyopia is a symptom caused by the natural course of ________.

• Developmental biology

• Ageing

• young age

• Human development

Some diabetic patients get early presbyopia. Why?

• Lack of glucose supply to the Ciliary muscles

• Zonules die out

• Lens become opaque

• lens hard