OPT 1155 - Final Exam UPDATED ACTUAL
Questions and CORRECT Answers
Using the Nominal Lens Power formula, calculate the total lens power having a front surface
curve of +6.00 and a back surface curve of -3.00 - CORRECT ANSWER - +3.00
The index of refraction of crown glass is - CORRECT ANSWER - 1.523
Define the Nominal Lens Power Formula - CORRECT ANSWER - F1 + F2 = F Total
What contribution did Ben Franklin give to the optical profession? - CORRECT
ANSWER - invented bifocal lenses
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
Applying for Aspheric Lenses:
+4.00 aspheric - CORRECT ANSWER - +8.00
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
-6.00 -2.00 x90 ASHPERIC Lenses - CORRECT ANSWER - +0.50
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
-1.00 - CORRECT ANSWER - +5.50
Spectacle lenses are prescribed for 4 reasons: refractive errors, faulty binocular vision, protection
and comfort. - CORRECT ANSWER - True
, Crown glass is clear, ophthalmic glass and has an index of refraction of 1.49 - CORRECT
ANSWER - False
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
+6.00-2.00 x 90 - CORRECT ANSWER - +11.00
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
-1.00-6.00 x 90 - CORRECT ANSWER - +4.00
All of the following are characteristics of minus lenses except:
Diverge Light
Virtual Focus
Thinner at center, thicker at the edges
Minify Image
Effective power Increases as the Vertex Distance Increases
Shows with motion - CORRECT ANSWER - Effective power increases as the Vertex
Distance Increases
All of the following are advantages of plastic lenses except:
light weight
tints easily
scratches easily
good optics - CORRECT ANSWER - scratches easily
All of the following are characteristics of plus lenses except:
Questions and CORRECT Answers
Using the Nominal Lens Power formula, calculate the total lens power having a front surface
curve of +6.00 and a back surface curve of -3.00 - CORRECT ANSWER - +3.00
The index of refraction of crown glass is - CORRECT ANSWER - 1.523
Define the Nominal Lens Power Formula - CORRECT ANSWER - F1 + F2 = F Total
What contribution did Ben Franklin give to the optical profession? - CORRECT
ANSWER - invented bifocal lenses
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
Applying for Aspheric Lenses:
+4.00 aspheric - CORRECT ANSWER - +8.00
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
-6.00 -2.00 x90 ASHPERIC Lenses - CORRECT ANSWER - +0.50
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
-1.00 - CORRECT ANSWER - +5.50
Spectacle lenses are prescribed for 4 reasons: refractive errors, faulty binocular vision, protection
and comfort. - CORRECT ANSWER - True
, Crown glass is clear, ophthalmic glass and has an index of refraction of 1.49 - CORRECT
ANSWER - False
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
+6.00-2.00 x 90 - CORRECT ANSWER - +11.00
Applying the concept of corrected curve lens theory, choose the best base curve for the
following:
-1.00-6.00 x 90 - CORRECT ANSWER - +4.00
All of the following are characteristics of minus lenses except:
Diverge Light
Virtual Focus
Thinner at center, thicker at the edges
Minify Image
Effective power Increases as the Vertex Distance Increases
Shows with motion - CORRECT ANSWER - Effective power increases as the Vertex
Distance Increases
All of the following are advantages of plastic lenses except:
light weight
tints easily
scratches easily
good optics - CORRECT ANSWER - scratches easily
All of the following are characteristics of plus lenses except:
