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

Chalam, Kakarla V.; Shah, Vinay

doi:10.1016/j.survophthal.2004.04.010

Cited by 57 publications

(34 citation statements)

References 14 publications

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“…We think that the decreased fundus visibility during Seprafilm insertion can be now overcome if we use a wide-angle viewing system and chandelier illumination, which provides an excellent view of the peripheral retinal breaks even after fluid-air exchange. 10 In the current case series, we delivered a 5 × 2 mm sheet of Seprafilm through a 3 mm sclerotomy site. However, we need to develop a more efficient system for intraocular delivery of larger sheets of Seprafilm from smaller sclerotomy sites for 23, 25, or 27 gauge vitrectomy currently the worldwide standard.…”

Section: Discussionmentioning

confidence: 99%

Patching retinal breaks with Seprafilm for treating retinal detachments in humans: 9 years of follow-up

Haruta

Arai²,

Sueda

et al. 2017

Eye

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Purpose To describe the long-term surgical outcomes of four patients treated for retinal detachment using Seprafilm as a novel technique. Methods Retinal breaks in four eyes were covered with Seprafilm using a transvitreal approach after cataract surgery, pars plana vitrectomy, fluid-air exchange, and laser photocoagulation. Neither long-standing gas nor silicone oil was used. The patients were not instructed to maintain a specific head positioning postoperatively. Results Successful retinal reattachment was achieved with a single surgery in all four eyes, and none developed proliferative vitreoretinopathy. The mean best-corrected visual acuity preoperatively and 9 years postoperatively were 20/97 and 20/33, respectively. The intraocular pressure increased several days postoperatively that lasted no longer than 2 weeks. Visual field defects either in the inferonasal or inferotemporal quadrant were detected postoperatively. The mean electroretinogram a-and b-wave amplitude ratios of the operated eyes to the fellow eyes were 0.68 and 0.64 preoperatively and 0.87 and 0.92 postoperatively, respectively. The mean corneal endothelial cell density was 2365 cells/mm 2 preoperatively and 2592 cells/mm 2 postoperatively. Conclusion Covering retinal breaks with Seprafilm may promote retinal reattachment without gas tamponade and postoperative head positioning. The visual outcomes 9 years postoperatively showed no apparent adverse effects of intraocular application of Seprafilm.

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Section: Discussionmentioning

confidence: 99%

Patching retinal breaks with Seprafilm for treating retinal detachments in humans: 9 years of follow-up

Haruta

Arai²,

Sueda

et al. 2017

Eye

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“…5 Even with the wide-angle viewing systems, image distortion of the peripheral fundus cannot be avoided. 4 Because our new lens has lower prism angle of 13°to 15°a nd is as thin as 0.5 mm, the effective aperture is wide and the lens has less chromatic aberrations. As a result, it produces a brighter image with less distortion.…”

Section: Commentmentioning

confidence: 97%

“…Although the wide-angle viewing system allows for observation of wider area, image resolution and stereopsis are limited when compared with the contact lens system. 4 The conventional prismatic lens system provides a clear view of the surgical field, but prismatic lenses with greater prism angle (30 or 45°) have significant amount of chromatic aberrations, resulting in blurring of the peripheral image. 5 In addition, observation of the ora serrate is not possible with the prismatic lenses.…”

mentioning

confidence: 99%

Truncated Contact Lenses for Peripheral Vitrectomy

Okamoto

Nakano²,

Oshika³

2012

Retina

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“…Second, quality of the fundus view may be better when the contact lens and the wide-angle viewing system are used together because of the decreased aberrations caused from the cornea, intraocular and crystalline lenses. 4,5 Third, the stereopsis which is very important during membrane peeling. Magnifying vitrectomy contact lenses provide excellent stereopsis during surgery; on the other hand the major limitation of the noncontact systems is the limited depth of field during macular surgery.…”

mentioning

confidence: 99%