NBEO- Physiological Optics (Mostly
Conceptual) Exam Questions and Answers
with Verified Solutions | Latest Updated 2026
Which of the following is NOT true B (BIO has larger depth of focus)
when comparing BIO to Direct
Ophthalmoscopy?
A) BIO provides a larger field of
view
than Direct Ophthalmoscopy
B) Direct Ophthalmoscopy has a
larger depth of focus than BIO
C) Direct Ophthalmoscopy has
more
magnification than BIO
D) BIO provides a real, inverted
image
E) Direct Ophthalmoscopy
provides
a virtual, upright image
Does BIO or Direct BIO
Ophthalmoscopy
form a real, inverted image?
Does BIO or Direct Direct Ophthalmoscopy
Ophthalmoscopy
form a virtual, upright image?
,What is the equation for manual x = f^2 Fv
Lensometry? x= distance target is moved (m), if target is
moved
away from doctor then x= (-)
f= focal length of standard lens (m)
Fv= Back vertex power
If the center of the cross hairs falls A) BI
to
the right of the center of the bulls-
eye during lensometry, what type
of
prism is in the lens if you are
measuring the right eye?
A) BI
B) BO
C) BU
D) BD
Will a minus lens have "with" or With
"against" motion during hand
neutralization?
Will a plus lens have "with" or Against
"against" motion during hand
neutralization?
, What is the primary purpose of a B) Measures the base curve of RGP
Radiuscope?
A) Measures the sag
B) Measures the base curve of
RGP
C) Measures the base curve of
soft
lens
D) Measures the peripheral curves
of
RGP
A Keratometer measures the 3 mm
central
___________ mm of the cornea.
For Keratometry, the cornea acts Convex mirror
as
which type of mirror? Convex or
Concave?
What is the primary purpose of a A) Measures the sag of a lens
Lens Clock?
A) Measures the sag of a lens
B) Measures the base curve of
RGP
C) Measures the base curve of
soft
lens
D) Measures the peripheral curves
of
RGP
Conceptual) Exam Questions and Answers
with Verified Solutions | Latest Updated 2026
Which of the following is NOT true B (BIO has larger depth of focus)
when comparing BIO to Direct
Ophthalmoscopy?
A) BIO provides a larger field of
view
than Direct Ophthalmoscopy
B) Direct Ophthalmoscopy has a
larger depth of focus than BIO
C) Direct Ophthalmoscopy has
more
magnification than BIO
D) BIO provides a real, inverted
image
E) Direct Ophthalmoscopy
provides
a virtual, upright image
Does BIO or Direct BIO
Ophthalmoscopy
form a real, inverted image?
Does BIO or Direct Direct Ophthalmoscopy
Ophthalmoscopy
form a virtual, upright image?
,What is the equation for manual x = f^2 Fv
Lensometry? x= distance target is moved (m), if target is
moved
away from doctor then x= (-)
f= focal length of standard lens (m)
Fv= Back vertex power
If the center of the cross hairs falls A) BI
to
the right of the center of the bulls-
eye during lensometry, what type
of
prism is in the lens if you are
measuring the right eye?
A) BI
B) BO
C) BU
D) BD
Will a minus lens have "with" or With
"against" motion during hand
neutralization?
Will a plus lens have "with" or Against
"against" motion during hand
neutralization?
, What is the primary purpose of a B) Measures the base curve of RGP
Radiuscope?
A) Measures the sag
B) Measures the base curve of
RGP
C) Measures the base curve of
soft
lens
D) Measures the peripheral curves
of
RGP
A Keratometer measures the 3 mm
central
___________ mm of the cornea.
For Keratometry, the cornea acts Convex mirror
as
which type of mirror? Convex or
Concave?
What is the primary purpose of a A) Measures the sag of a lens
Lens Clock?
A) Measures the sag of a lens
B) Measures the base curve of
RGP
C) Measures the base curve of
soft
lens
D) Measures the peripheral curves
of
RGP
