BIOMAT Database Logo BIOMAT Database Logo

Long-Term Corneal Refractive Power Changes Two Decades After Radial Keratotomy With Microperforations. 2023

Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Department of Ophthalmology (Y.I., S.K., T.S., Y.O., K.N.), Osaka University Graduate School of Medicine, Osaka, Japan; Department of Innovative Visual Science (S.K., R.I.), Osaka University Graduate School of Medicine, Osaka, Japan; and SEED Co., Ltd (R.I.), Tokyo, Japan.

We retrospectively examined corneal refractive power in three patients who had been followed up for more than 20 years after radial keratotomy (RK) with microperforations (MPs). All patients underwent RK in both eyes and were referred to our clinic because of postoperative decreased vision. MP was observed in five of the six eyes at the initial visit. The corneal refractive power of the anterior and posterior surfaces of the 6-mm-diameter cornea was examined using Fourier analysis based on corneal shape analysis using anterior segment optical coherence tomography. The spherical components decreased in all three cases. The asymmetry and higher-order irregularity components and fluctuations in corneal refractive power were markedly greater in the two cases with MP in both eyes. Fluctuations in corneal refractive power were observed at more than 20 years after RK with MP. Therefore, careful observation is necessary, even after a long-term postoperative follow-up period.

UI MeSH Term Description Entries
D007646 Keratotomy, Radial A procedure to surgically correct REFRACTIVE ERRORS by cutting radial slits into the CORNEA to change its refractive properties. Radial Keratotomy,Keratotomies, Radial,Radial Keratotomies
D011184 Postoperative Period The period following a surgical operation. Period, Postoperative,Periods, Postoperative,Postoperative Periods
D003315 Cornea The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed) Corneas
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012189 Retrospective Studies Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons. Retrospective Study,Studies, Retrospective,Study, Retrospective

Related Publications

Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
[Management of corneal microperforations during radial keratotomy].
January 1994, Journal francais d'ophtalmologie,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Intraocular lens power calculation after radial keratotomy: estimating the refractive corneal power.
June 2007, Journal of cataract and refractive surgery,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
[Long-term changes of corneal endothelial cells with radial keratotomy].
June 2008, [Zhonghua yan ke za zhi] Chinese journal of ophthalmology,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Corneal integrity after refractive surgery. Effects of radial keratotomy and mini-radial keratotomy.
February 1995, Ophthalmology,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Refractive changes with increasing altitude after radial keratotomy.
June 1993, American journal of ophthalmology,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Daily refractive changes persisting after radial keratotomy.
August 1989, American journal of ophthalmology,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Corneal topographic changes after radial keratotomy.
January 1989, Ophthalmology,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Refractive changes at extreme altitude after radial keratotomy.
June 1995, American journal of ophthalmology,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
Multifocal corneal topographic changes after radial keratotomy.
February 1992, Ophthalmic surgery,
Yuri Iwamoto, and Shizuka Koh, and Ryota Inoue, and Takeshi Soma, and Yoshinori Oie, and Naoyuki Maeda, and Kohji Nishida
The relation between diurnal changes in intraocular pressure and refractive power after radial keratotomy.
January 1988, Metabolic, pediatric, and systemic ophthalmology (New York, N.Y. : 1985),
Copied contents to your clipboard!