OPT 210 BIOMICROSCOPY NEW UPDATE WITH CORRECT ANSWERS!!

OPT 210 BIOMICROSCOPY NEW UPDATE WITH CORRECT
ANSWERS!!


What is the cobalt blue filter used for?

Enhances view or fluorescein dye in the tear film and is typically used for staining,
corneal/conjunctival epithelium integrity and goldmann tonometry




What is the red free filter used for?

Used to enhance the view of blood vessels and determine if retinal pigment is choroidal
or retinal/RPE




What is the neutral density filter used for?

Decreases maximum brightness for photosensitive patients




What is the heat absorbing filter used for?

Built into most lamps and used for decreasing patient discomfort




What is the gray filter used for?

Decreases maximum brightness for photosensitive pts




What is the yellow filter used for?

, For good contrast enhancement when using fluorescein and cobalt blue filter (especially
for rigid CL)




What is the diffuser filter used for?

Used for general overall observations of the eye and adnexa




Diffuse beam

Used to illuminate and grossly observe large areas of the eye/adnexa

- low mag (10x)

- full height and width

- moderate illumination

- +/- diffuse filter




Parallelepiped beam

Used to view lids, lashes, conjunctiva, cornea, iris, and lens

- 10x or 16x

- 45-60° beam angle

- 1-2 mm beam width, full height

- moderate illumination




Optic section beam

Used to assess corneal layers and other clear structures (lens, conj, vitreous) to help
appreciate the thickness and differentiate the layer of an opacity

- 16x