NBEO PART 1: Optics Review – Questions &
Accurate Answers
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Terms in this set (284)
As light travels through light it A (plus or less minus)
becomes more
A. Plus
B. Minus
This lens is a concave lens — the Lower, diverging ( - ; “Lowered into the cave to
interface wraps around a higher -OR- dive”)
lower medium and is always diverging
-OR- converging
This lens is a convex lens — the Higher, converging (+)
interface wraps around a higher -OR-
lower medium and is always diverging
-OR- converging
When parallel light enters a lens it is Secondary focal point (f2)
referring to
when parallel light leaves a lens it is Primary focal point (f1)
referring to
,A real image will A (converge; “RODRIC got COVID” - RIC = real
A. Converge image converges)
B. Diverge
A virtual image will B (diverge; “RODRIC got COVID” - VID = Virtual
A. Converge image diverging)
B. Diverge
A real object will B (diverge; RODRIC got COVID - ROD = real obj
A. Converge diverges)
B. Diverge
A virtual object will A (converge; RODRIC got COVID - COV = virtual obj
A. Converge converges)
B. Diverge
When performing gonioscopy what TIR (total internal reflection)
must be overcome in order to view
the angle structures
Plus lenses become weaker -OR- Weaker (less plus)
stronger when moving closer to the
cornea
,Minus lenses become weaker -OR- Stronger (more minus)
stronger when moving closer to the
cornea
T/F: Contact lenses are always more True
plus powered compared to glasses
A convex mirror is A (diverging; opposite of convex lenses)
A. Diverging
B. Converging
A concave mirror is B (converging; opposite of concave lenses)
A. Diverging
B. Converging
What part of the human eye acts as a Cornea
convex mirror
2 scenarios in which the concept of Hirschberg, keratometry
the cornea being a convex mirror is
utilized in clinic
In Keratometry, how would the mires B (minified compared to emmetrope)
appear if the patient has a
steep/strong cornea?
A. Magnified
B. Minified
C. Same size
, For every 2˚ of pantoscopic tilt how 1 mm
much does the the OC need to be
lowered by?
What kind of image does a galilean Virtual
telescope form?
Which of the following is true of C (has less magnification; all others were false)
Binocular Indirect Ophthalmoscope
(BIO)
A. Small field of view
B. Forms an upright and virtual image
C. Has less magnification
D. Has a decreased depth of focus
When using a lensometer and you A (+ ; distance and back vertex power is also positive)
move target forward/towards the
standard lens to neutralize what kind
of Rx has been found?
A. +
B. -
When using a lensometer and you B (- ; distance and back vertex power is also
move target away the standard lens to negative)
neutralize what kind of Rx has been
found?
A. +
B. -
You are handed a unknown lens and Minus (- ; stacked apex to apex)
you notice it moves with motion (hand
neutralization). What kind of power
does the lens have?
Accurate Answers
Save Groups
Terms in this set (284)
As light travels through light it A (plus or less minus)
becomes more
A. Plus
B. Minus
This lens is a concave lens — the Lower, diverging ( - ; “Lowered into the cave to
interface wraps around a higher -OR- dive”)
lower medium and is always diverging
-OR- converging
This lens is a convex lens — the Higher, converging (+)
interface wraps around a higher -OR-
lower medium and is always diverging
-OR- converging
When parallel light enters a lens it is Secondary focal point (f2)
referring to
when parallel light leaves a lens it is Primary focal point (f1)
referring to
,A real image will A (converge; “RODRIC got COVID” - RIC = real
A. Converge image converges)
B. Diverge
A virtual image will B (diverge; “RODRIC got COVID” - VID = Virtual
A. Converge image diverging)
B. Diverge
A real object will B (diverge; RODRIC got COVID - ROD = real obj
A. Converge diverges)
B. Diverge
A virtual object will A (converge; RODRIC got COVID - COV = virtual obj
A. Converge converges)
B. Diverge
When performing gonioscopy what TIR (total internal reflection)
must be overcome in order to view
the angle structures
Plus lenses become weaker -OR- Weaker (less plus)
stronger when moving closer to the
cornea
,Minus lenses become weaker -OR- Stronger (more minus)
stronger when moving closer to the
cornea
T/F: Contact lenses are always more True
plus powered compared to glasses
A convex mirror is A (diverging; opposite of convex lenses)
A. Diverging
B. Converging
A concave mirror is B (converging; opposite of concave lenses)
A. Diverging
B. Converging
What part of the human eye acts as a Cornea
convex mirror
2 scenarios in which the concept of Hirschberg, keratometry
the cornea being a convex mirror is
utilized in clinic
In Keratometry, how would the mires B (minified compared to emmetrope)
appear if the patient has a
steep/strong cornea?
A. Magnified
B. Minified
C. Same size
, For every 2˚ of pantoscopic tilt how 1 mm
much does the the OC need to be
lowered by?
What kind of image does a galilean Virtual
telescope form?
Which of the following is true of C (has less magnification; all others were false)
Binocular Indirect Ophthalmoscope
(BIO)
A. Small field of view
B. Forms an upright and virtual image
C. Has less magnification
D. Has a decreased depth of focus
When using a lensometer and you A (+ ; distance and back vertex power is also positive)
move target forward/towards the
standard lens to neutralize what kind
of Rx has been found?
A. +
B. -
When using a lensometer and you B (- ; distance and back vertex power is also
move target away the standard lens to negative)
neutralize what kind of Rx has been
found?
A. +
B. -
You are handed a unknown lens and Minus (- ; stacked apex to apex)
you notice it moves with motion (hand
neutralization). What kind of power
does the lens have?
