Question

What is represented by ETDRS in a diabetic vision chart?

• A. Elective treatment for diabetic retinopathy scales
• B. Extended Rx for diabetes review study
• C. Early Treatment Diabetic Retinopathy Study
• D. Eye test drum review study

Hint:

ETDRS is the name of a landmark diabetic retinopathy treatment trial.

Answer 1

The Correct Option is C

This question checks if you know the full form of ETDRS, a term you will see written on many vision charts used in eye clinics.

1. Elective treatment for diabetic retinopathy scales: Sounds close to the real name but is not correct, there is no study or chart with this exact title.
2. Extended Rx for diabetes review study: Also made up to sound similar, but this is not the source of the ETDRS name.
3. Early Treatment Diabetic Retinopathy Study: This is correct. It was a landmark trial on laser treatment timing in diabetic retinopathy, and the vision chart it introduced (with a fixed number of letters per row and even log spacing) took its name from the trial.
4. Eye test drum review study: Not a real name, "drum" has nothing to do with how this chart works or got named.

So the correct expansion is Early Treatment Diabetic Retinopathy Study, matching option (C).

Let's summarize:

• ETDRS charts use equal letters per row and log MAR spacing for more accurate vision testing.
• The name comes directly from the original diabetic retinopathy treatment trial.

The correct answer is the Early Treatment Diabetic Retinopathy Study.