Optics of wide-angle panoramic viewing system-assisted vitreous surgery

Survey of Ophthalmology
Kakarla V Chalam, Vinay A Shah

Abstract

The purpose of the article is to describe the optics of the contact wide-angle lens system with stereo-reinverter for vitreous surgery. A panoramic viewing system is made up of two components; an indirect ophthalmoscopy lens system for fundus image viewing, which is placed on the patient's cornea as a contact lens, and a separate removable prism system for reinversion of the image mounted on the microscope above the zooming system. The system provides a 104 degrees field of view in a phakic emmetropic eye with minification, which can be magnified by the operating microscope. It permits a binocular stereoptic view even through a small pupil (3 mm) or larger. In an air-filled phakic eye, field of view increases to approximately 130 degrees. The obtained image of the patient's fundus is reinverted to form true, erect, stereoscopic image by the reinversion system. In conclusion, this system permits wide-angle panoramic view of the surgical field. The contact lens neutralizes the optical irregularities of the corneal surface and allows improved visualization in eyes with irregular astigmatism induced by corneal scars. Excellent visualization is achieved in complex clinical situations such as miotic pupils, lenticular opacities, and ...Continue Reading

References

Nov 1, 1979·Archives of Ophthalmology·F I Tolentino, H M Freeman
Jan 1, 1987·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·M Spitznas
Jan 1, 1987·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·M Spitznas, J Reiner
Sep 1, 1983·Ophthalmology·P C HoF I Tolentino
May 1, 1981·American Journal of Ophthalmology·M B LandersM L Wolbarsht
Nov 1, 1995·Archives of Ophthalmology·M Ohji, Y Tano
Dec 1, 1995·Archives of Ophthalmology·E H Bovey, M Gonvers
Mar 21, 1998·Retina·H Hayashi, K Oshima
Feb 5, 2003·American Journal of Ophthalmology·Gholam A PeymanPaul Whalen
Mar 26, 2003·American Journal of Ophthalmology·Kakarla V ChalamVinay A Shah
Apr 25, 2003·Ophthalmic Research·Vinay A Shah, K V Chalam
Oct 24, 2003·Retina·Vinay A Shah, Kakarla V Chalam

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Citations

Jun 25, 2014·Journal of Cataract and Refractive Surgery·Makoto InoueAkito Hirakata
Jan 11, 2012·Journal of Visual Communication in Medicine·Chris G Pirie, Stefano Pizzirani
Oct 6, 2012·American Journal of Ophthalmology·Makoto InoueAkito Hirakata
Jul 13, 2012·Ophthalmic Surgery, Lasers & Imaging : the Official Journal of the International Society for Imaging in the Eye·Akira Hirata, Satoshi Okinami
Mar 31, 2009·American Journal of Ophthalmology·Song Ee ChungSe Woong Kang
Jan 25, 2019·The British Journal of Ophthalmology·Soo Chang ChoKyu Hyung Park
Aug 29, 2012·Retina·Fumiki OkamotoTetsuro Oshika
Sep 7, 2019·Retina·Diane T SiegelAndrew M Hendrick
May 16, 2020·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·José Antonio RocaLihteh Wu
Jun 27, 2019·International Journal of Retina and Vitreous·Radwan S AjlanMartin A Mainster
Mar 18, 2017·Current Opinion in Ophthalmology·Sarah P Read, Jorge A Fortun
Dec 17, 2016·International Journal of Retina and Vitreous·Paulo Ricardo Chaves de OliveiraDavid Robert Chow
Dec 20, 2019·International Ophthalmology Clinics·Marisa G TiegerDean Eliott
Jun 25, 2020·International Ophthalmology Clinics·Tamer M HadiMitul C Mehta
Jan 27, 2021·Japanese Journal of Ophthalmology·Makoto InoueAkito Hirakata
Nov 19, 2020·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Giuseppe DemarinisEnrico Peiretti
Dec 7, 2007·Ophthalmic Surgery, Lasers & Imaging : the Official Journal of the International Society for Imaging in the Eye·K V ChalamSwati Agarwal
Aug 18, 2021·Acta Ophthalmologica·Qin-Tuo PanZong-Duan Zhang

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