[A simple method of assessing monocular visual acuity in nystagmus ].

Visual acuity examined with both eyes-binocularly-often shows a better result than monocular examination. The nystagmus intensity increases when one eye is occluded or vision is blurred by a plus lens. The authors suggest a simple method to examine visual acuity monocularly. The procedure is appropriate to preserve the attenuation of nystagmus under binocular condition.