Hemenger, R P Explanation for good visual acuity in uncorrected residual hyperopia and presbyopia after radial keratotomy. [electronic resource] - Investigative ophthalmology & visual science Aug 1990 - 1644-6 p. digital Publication Type: Journal Article ISSN: 0146-0404 Subjects--Topical Terms: Contrast SensitivityHumansHyperopia--surgeryKeratotomy, RadialPresbyopia--surgeryVisual Acuity