Paired comparison of contrast sensitivity in diffractive multifocal IOLs and conventional monofocal IOLs.
Aust N Z J Ophthalmol
; 18(3): 325-8, 1990 Aug.
Article
em En
| MEDLINE
| ID: mdl-2261181
ABSTRACT
Multifocal intraocular lens (IOL) optics produce a retinal image of reduced contrast, which results from splitting incoming light between multiple focal points. This study sought to determine whether the reduced-contrast image results in functional loss of contrast sensitivity. Contrast sensitivity was measured in patients in the US Food and Drug Administration (FDA) study of the 3M Diffractive IOL, using the Pelli-Robson Letter Chart. Fifty-eight of these patients, including six from our clinic, were 'best-case' patients with no pathology, and also had paired multifocal/monofocal implants. Data from these 'best-care' patients with paired eyes indicate no functional difference in contrast sensitivity. Additional data obtained on our six patients with the Regan Low Contrast Charts suggest small predictable differences may exist for some patients at very low contrast levels. Further study is needed to determine whether these differences have functional significance.
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Base de dados:
MEDLINE
Assunto principal:
Sensibilidades de Contraste
/
Lentes Intraoculares
Idioma:
En
Ano de publicação:
1990
Tipo de documento:
Article