Prescription AnalysisQuestion 42 of 100
A -8.00 D lens is moved closer to the eye. Its effective minus power does what?
a.Decreases (less minus effect)
b.Increases (more minus effect)
c.Stays exactly the same
d.Becomes plus power
Explanation
For a minus lens moved closer to the eye, the effective power decreases; moved farther away, the effective minus power increases. Vertex compensation adjusts for this in high prescriptions.
Practice all 100 questions free — no signup required.
Related questions on this topic
- Monocular PD is measured from what to what?
- A binocular distance PD of 64 mm typically corresponds to what near PD range?
- Compensated (effective) power differs from the prescribed power mainly due to what?
- Neutralizing a lens with a lensmeter finds what point?
- Hand neutralization of an unknown lens uses what technique?
- With-the-rule astigmatism typically has the cylinder axis oriented near what?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against ABO (American Board of Opticianry) Certified Optician Exam · How we review