OPT 210 Midterm 2 Questions And Correct Answers!!
What are the 2 uses of the cobalt blue slit lamp filter?
1. enhanced view of fluorescein dye in cornea/conj epithelium
2. GAT
What are the 2 uses of the red free (green) slit lamp filter?
1. enhance BV/hemorrhage view
2. determine if retinal pigment is in choroid or retina/RPE
What is the main use of the neutral density slit lamp filter?
decrease max brightness for photosensitive pt
What are the 2 uses of the yellow slit lamp filter?
1. photophobic pt
2. contrast enhancement with fluorescein and cobalt blue filter (RGPs)
,What is the main use of the diffuser (flip up translucent tab) slit lamp filter?
general overall observation of eye and adnexa, softens beam edges
What is the use of the diffuse beam?
gross observation of large areas of eye and adnexa, see everything at once
What is the mag for a diffuse beam?
low - 10x
What is the height and width for a diffuse beam?
full beam height and width
What is the illumination for a diffuse beam?
,moderate
What is the use of the parallelpiped beam?
view surface irregularities on the lid, lashes, conj, cornea, iris, lens - want to be able to
appreciate width here
What is the mag of the parallelpiped beam?
low to moderate - 10x to 16x
What is the angle of the parallelpiped beam?
45-60 deg
What is the height and width of the parallelpiped beam?
2mm width
, full height
What is the illumination of the parallelpiped beam?
moderate
What is the use of the optic section beam?
assess layers and thickness of clear structures like cornea, lens, conj, vitreious to look
at things like corneal thinning, pinguecula, opacities
What is the mag of the optic section beam?
moderate - 16x
What is the angle of the optic section beam?
45-60 deg
What are the 2 uses of the cobalt blue slit lamp filter?
1. enhanced view of fluorescein dye in cornea/conj epithelium
2. GAT
What are the 2 uses of the red free (green) slit lamp filter?
1. enhance BV/hemorrhage view
2. determine if retinal pigment is in choroid or retina/RPE
What is the main use of the neutral density slit lamp filter?
decrease max brightness for photosensitive pt
What are the 2 uses of the yellow slit lamp filter?
1. photophobic pt
2. contrast enhancement with fluorescein and cobalt blue filter (RGPs)
,What is the main use of the diffuser (flip up translucent tab) slit lamp filter?
general overall observation of eye and adnexa, softens beam edges
What is the use of the diffuse beam?
gross observation of large areas of eye and adnexa, see everything at once
What is the mag for a diffuse beam?
low - 10x
What is the height and width for a diffuse beam?
full beam height and width
What is the illumination for a diffuse beam?
,moderate
What is the use of the parallelpiped beam?
view surface irregularities on the lid, lashes, conj, cornea, iris, lens - want to be able to
appreciate width here
What is the mag of the parallelpiped beam?
low to moderate - 10x to 16x
What is the angle of the parallelpiped beam?
45-60 deg
What is the height and width of the parallelpiped beam?
2mm width
, full height
What is the illumination of the parallelpiped beam?
moderate
What is the use of the optic section beam?
assess layers and thickness of clear structures like cornea, lens, conj, vitreious to look
at things like corneal thinning, pinguecula, opacities
What is the mag of the optic section beam?
moderate - 16x
What is the angle of the optic section beam?
45-60 deg
