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Tissue addition theory of radial keratotomy: a geometric model.

Abstract：

:We examined the use of a geometric model to explain the effects of radial keratotomy (RK) on corneal topography based on wound gape of radial incisions. Histopathologic studies of healed human RK incisions revealed incision gape in Bowman's membrane and anterior stroma, with intervening epithelial ingrowth or fibrous scarring. For six human RK incisions examined centrally, mid-peripherally, and peripherally, the linear separation of the cut ends of Bowman's membrane averaged 0.012 mm, 0.018 mm, and 0.027 mm, respectively. The effect of postoperative corneal flattening of the "addition of tissue" within incisions was mathematically predicted by calculating the effects of inducing radial gape on a spherical shell. The predicted change in corneal curvature agreed closely with data from a human case report. The "tissue addition" theory may partly explain the change in corneal topography following RK and subsequent wound healing.

journal_name

J Cataract Refract Surg

journal_title

Journal of cataract and refractive surgery

authors

Sawusch MR,Wan WL,McDonnell PJ

doi

10.1016/s0886-3350(13)80850-4

subject

Has Abstract

pub_date

1991-07-01 00:00:00

pages

448-53

issue

4

eissn

0886-3350

issn

1873-4502

pii

S0886-3350(13)80850-4

journal_volume

17

pub_type

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