Monovision Problem Solving Example:

Spec Rx:
- OD: -3.25 -0.50 x 180
- OS: -4.00 DS
- Add: +2.00

Patient CL Rx in Air Optix Aqua 8.6/14.2:
- OD: -3.50 DS
- OS: -2.00 DS

What Rx would you prescribe for a second pair of glasses over CLs for driving Rx?

a) OD: -3.25 -0.50 x 180, OS: Plano, Add: +2.00
b) OD: -3.50, OS: -2.00, Add: +2.00
c) OD: -3.25 -0.50 x 180, OS: -4.00 DS, Add: +2.00
d) OD: Plano, OS: -2.00, Add: +2.00

The correct answer to prescribe a second pair of glasses over contacts for driving in a monovision setup is option a) OD: -3.25 -0.50 x 180, OS: Plano, with an add power of +2.00 for near tasks.

Explanation:

The student's question relates to prescribing a second pair of glasses for driving, to be worn over contacts, using a monovision setup. The correct prescription for a second pair of glasses in this case is -3.25 -0.50 x 180 for the right eye (OD) and plano (no additional correction) for the left eye (OS), with an add power of +2.00 for near tasks. This is option a) OD: -3.25 -0.50 x 180, OS: Plano, Add +2.00. The patient's right eye would be corrected for distance (monovision), while the left eye, corrected for near vision with a contact lens, would not need additional correction for driving. The add power of +2.00 is used for near tasks and does not influence the distance vision needed for driving.