2 doctors weighed in:
Are there errors, distortions, or disadvantages of using a mirror in a visual acuity test?
2 doctors weighed in

Dr. Joseph Barakeh
Ophthalmology
1 doctor agrees
In brief: No
No, the image is the same as if you were looking the entire 20 feet (or 6 meters).
The virtual image produced by the mirror is 20 feet away. Now, if the mirror is very dirty or dusty, maybe.

In brief: No
No, the image is the same as if you were looking the entire 20 feet (or 6 meters).
The virtual image produced by the mirror is 20 feet away. Now, if the mirror is very dirty or dusty, maybe.
Dr. Joseph Barakeh
Dr. Joseph Barakeh
Thank
Get help from a real doctor now
Dr. Steven Seres
Board Certified,
17 years in practice
497K people helped
Continue
107,000 doctors available
Read more answers from doctors