Lecture 5: Illumination Techniques for Lens, Anterior Chamber, and Anterior Vitreous

Question 1

What is the wide beam for?

Answer 1

mostly surface

Question 2

What is the parallelepiped for?

Answer 2

Balance of surface and depth

Question 3

What is the optical section for?

Answer 3

Mostly depth

Question 4

______ angles allows for viewing depth without distraction from reflections from upper layers.

Answer 4

Wider angles (generally 30’ though).

Question 5

This technique is useful in evaluating corneal lesions such as micro cysts, “fingerprint” lines, subtle infiltrates, and KPs.

Answer 5

indirect illumination

Question 6

What can allow you to see the damage of the soft tissue?

Answer 6

indirect light

Question 7

Specular reflection allows you to see what (45’ angle)?

Answer 7

endothelium

Question 8

What are small spots you see at the back of the endothelium under specular reflection?

Answer 8

corneal guttata; Fusch’s dystrophy; indirect

Question 9

Anteriorly the Y suture is ____.

Answer 9

erect

Question 10

Posteriorly the Y suture is _____.

Answer 10

inverted

Question 11

Retro-illumination set-up
Beam?
Angle?
intensity?
magnification?

Answer 11

parallelepiped (4mm wide)
0 to 45-60’
medium
10-16x

Question 12

Retro cornea

Answer 12

light bounce off iris; out of click

Question 13

Retro iris

Answer 13

light into pupil, bounce off of retina; light in click

Question 14

Retro lens

Answer 14

light into pupil, bounce off of retina; light in click

Question 15

The ____ nucleus is the site of the Y-sutures.

Answer 15

fetal nucleus

Question 16

The optically empty retrolental space is called…..

Answer 16

Berger’s Space