Wide-angle viewing system with operating microscope OMS800-OFFISS and 120-diopter convex lens

Koichiro Yata, Atsuhiro Tanikawa, Daisuke Nakata, Yuzo Miyake, Yoshinori Ozeki, Hidenori Tanaka, Naoichi Horio, Masayuki Horiguchi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Background : OMS800-OFFISS was designed for bimanual vitreous surgery. It can be converted into a wide-viewing system by substituting+40 diopter lens by a+120 diopter one and additional use of light pipe. The microscope can be operated independent of the convex lens. Purpose: To evaluate the maximum range of intraoperative observation with this system. Cases: A total of 1,056 eyes were operated using this system during the past 12 months. The series comprised 49 phakic eyes, 174 pseudophakic eyes, and 833 aphakic eyes. Results: Vitreous surgery could be performed without problem in these 1,056 eyes. In consecutive 110 eyes, ora serrata could be observed in 103 eyes (94%) without indenting the sclera. The vitreous base could be observed in the other 7 eyes. Conclusion: The present system enables observation of the fundus in wide angle, operation of microscope independent of convex lens, and is useful in observing the fundus during vitreous surgery.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalJapanese Journal of Clinical Ophthalmology
Issue number2
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Ophthalmology


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