Patients with keratoconus who underwent manifest refraction vs. autorefraction achieved significantly better corrected distance visual acuity with spectacles.
Researchers examined 90 eyes with keratoconus with both autorefraction using the KR8800 keratorefractometer (Topcon) and manifest refraction done by the same optometrist under identical dim room conditions using the CV3000 automatic phoropter (Topcon). Eyes were examined in random order, 43 with autorefraction first and 47 with manifest refraction first.
Mean spectacle-corrected distance visual acuity improved with both methods, but was
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