LENS MCQ 1

1.       What is most common type of cataract

a.     Nuclear

b.       Anterior subcapsular

c.       Posterior subcapsular

d.       Cortical

e.       Christmas tree

2.       Which is not a risk factor for developing cataract

a.       U-V light exposure

b.       Diabetes

c.       Steroids

d.     Vitamin C use

e.       High myopia

3.       Which is a feature of lens

a.       Own blood supply

b.       Own innervation

c.       Lack of clarity

d.       Diffract light

e.     Refract light

4.       How much power lens contribute to 60D of eye  power

a.       10D

b.       20D

c.       30D

d.       40D

e.       50D

5.       What is true of lens growth

a.       Halts growth at 60

b.       Halts growth at 50

c.       Halts growth at 70

d.       Halts growth at 80

e.     Continue to grow all life

6.       Accommodation is mediated by

a.     Parasympathetic fibers of cranial nerve III

b.       Cranial nerve IV

c.       Cranial nerve V

d.       Cranial nerve VI

e.       Cranial nerve II

7.       Associated with Alport syndrome

a.        Anterior lenticonus

b.       Posterior lenticonus

c.       Anterior lentiglobus

d.       Posterior lentiglobus

e.       Oil droplet cataract

8.       Lens coloboma typically located

a.       Superotemporally

b.       Inferotemporally

c.       Superonasaly

d.       Inferonasally

e.       Centrally

9.       Zonular attachments in lens coloboma

a.     Are weakened or absent

b.       Are stronger

c.       Are Normal

d.       Equal in all directions

e.       None of above

10.       In microspherophakia, the lens can block pupil causing

a.       Primary angle closure glaucoma

b.     Secondary angle closure glaucoma

c.       Primay open angle glaucoma

d.       Secondary open angle glaucoma

e.       None 0f above