Biomaterial Database

Snellen visual acuity versus pattern reversal visual-evoked response acuity in clinical applications. 1994

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114.

We compared the best-corrected Snellen acuity (SA) and the pattern reversal visual-evoked response (PVER) acuity in normal subjects and patients. Forty-two eyes of 42 normal subjects were controls; 457 eyes of 329 patients comprised the patient group. A steady-state stimulus with five check sizes ranging from 160 to 10 min in 1.0-octave steps was used. The PVER acuity was derived from the best-fit linear function relating the amplitude to the log-adjusted check size. Three intercepts of 0, 1 and 2 microV were used in both groups, and the PVER acuities were called P0, P1 and P2. The SAs in normal subjects ranged from 20/15 to 20/20 (mean, 20/18.3) and in patients from 20/15 to 20/1,600 (mean, 20/56.9). In normals, the P0 showed the best agreement with the SA (mean acuity difference, +0.34 octave). The SA and P0 agreed within +/- 2.0 octaves in 33/42 (78.6%) eyes. In patients, the P0 also showed the best agreement with the SA; 306/457 (67.0%) eyes showed an acuity difference within +/- 2.0 octaves. Unlike normals, 83/457 (18.2%) eyes showed an acuity difference > -3.0 octaves. These eyes mostly had optic nerve disease with a flattened PVER amplitude-check size function curve. The P0 seems to correlate better with SA than P1 and P2, but this analytical method may be less effective in the presence of certain pathologic conditions.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009901	Optic Nerve Diseases	Conditions which produce injury or dysfunction of the second cranial or optic nerve, which is generally considered a component of the central nervous system. Damage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect.	Cranial Nerve II Diseases,Foster-Kennedy Syndrome,Optic Disc Disorders,Optic Disk Disorders,Optic Neuropathy,Second Cranial Nerve Diseases,Cranial Nerve II Disorder,Neural-Optical Lesion,Disc Disorder, Optic,Disk Disorder, Optic,Disorder, Optic Disc,Foster Kennedy Syndrome,Lesion, Neural-Optical,Neural Optical Lesion,Neural-Optical Lesions,Neuropathy, Optic,Optic Disc Disorder,Optic Disk Disorder,Optic Nerve Disease,Optic Neuropathies,Syndrome, Foster-Kennedy
D010364	Pattern Recognition, Visual	Mental process to visually perceive a critical number of facts (the pattern), such as characters, shapes, displays, or designs.	Recognition, Visual Pattern,Visual Pattern Recognition
D012164	Retinal Diseases	Diseases involving the RETINA.	Disease, Retinal,Diseases, Retinal,Retinal Disease
D002386	Cataract	Partial or complete opacity on or in the lens or capsule of one or both eyes, impairing vision or causing blindness. The many kinds of cataract are classified by their morphology (size, shape, location) or etiology (cause and time of occurrence). (Dorland, 27th ed)	Cataract, Membranous,Lens Opacities,Pseudoaphakia,Cataracts,Cataracts, Membranous,Lens Opacity,Membranous Cataract,Membranous Cataracts,Opacities, Lens,Opacity, Lens,Pseudoaphakias
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D005074	Evoked Potentials, Visual	The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.	Visual Evoked Response,Evoked Potential, Visual,Evoked Response, Visual,Evoked Responses, Visual,Potential, Visual Evoked,Potentials, Visual Evoked,Response, Visual Evoked,Responses, Visual Evoked,Visual Evoked Potential,Visual Evoked Potentials,Visual Evoked Responses
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

Related Publications

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Pattern reversal visual evoked response and Snellen visual acuity.

May 1994, Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Spatial frequency sweep pattern reversal VER acuity vs Snellen visual acuity: effect of optical defocus.

March 1996, Vision research,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Miniature fiber-optic pattern-reversal stimulator for determination of the visual evoked potential threshold; comparison with Snellen acuity.

January 1989, Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Comparison of preferential looking acuity and pattern reversal visual evoked response acuity in pediatric patients.

November 1997, Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

[Correlation of pattern reversal visual evoked potentials P100 with visual acuity].

April 2011, Fa yi xue za zhi,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Measurement of infant visual acuity from pattern reversal evoked potentials.

January 1978, Vision research,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

Snellen on visual acuity.

January 1962, American journal of ophthalmology,

Y H Ohn, and O Katsumi, and Y Matsui, and H Tetsuka, and T Hirose

[Snellen visual acuity evaluation].

January 2009, Arquivos brasileiros de oftalmologia,