What does SPEED measure?

SPEED: 4 symptom types (dryness, grittiness/scratchiness, soreness/irritation, burning/watering/eye fatigue) rated for frequency (0-3) and severity (0-4). Total score = sum of frequency and severity across all symptoms. Range 0-28.

How does SPEED compare to OSDI?

SPEED assesses frequency and severity of dryness symptoms. OSDI (Ocular Surface Disease Index, 0-100) includes functional questions (activity limitations). Both are validated PRO instruments. SPEED is shorter (2 pages vs OSDI 3 pages).

Is SPEED used as a treatment endpoint?

Yes. SPEED is used as a primary/secondary endpoint in dry eye clinical trials. MCID for SPEED is approximately 3.8 points. Cyclosporine and lifitegrast trials used SPEED alongside corneal staining as co-primary endpoints.

SPEED Dry Eye Symptom Score

Calculate SPEED (Standardized Patient Evaluation of Eye Dryness) questionnaire score (0-28). Score >=6 is consistent with dry eye disease; >=13 indicates severe symptomatic dry eye.

Use the full interactive calculator below, or

SPEED Dry Eye Symptom Score

Frequently Asked Questions

What does SPEED measure?

How does SPEED compare to OSDI?

Is SPEED used as a treatment endpoint?