Refractive state following retinal reattachment and silicone oil tamponade in dogs

Hoffman, Allison; Wolfer, J; Occelli, Laurence M.; Lehenbauer, Terry W.; Sapienza, John S.; Novak, Jenny M; Combs, Kelli L; Konrade, Kricket A.

doi:10.2460/ajvr.73.8.1299

Cited by 5 publications

(6 citation statements)

References 30 publications

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“…A large study in humans showed that 2 months after RRS, the visual acuity was ≥20/40, 20/50–20/100, and ≤20/200 in 51%, 17%, and 32% of patients, respectively . In this context, one should remember that the visual acuity of healthy, emmetropic dogs is about 20 of 75, and that this acuity is reduced postoperatively due to the 2.7–3.2 diopter hyperopia induced in canine patients by the silicone oil . Therefore, it is very likely that the postoperative vision in many of our patients was far from fully recovered, but functional vision with improved quality of life was achieved in most dogs.…”

Section: Discussionmentioning

confidence: 96%

Electroretinography is a prognostic indicator for postoperative vision in dogs undergoing retinal reattachment surgery

Hoffman

Sisler

Pappania

et al. 2017

Veterinary Ophthalmology

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Section: Discussionmentioning

confidence: 96%

Electroretinography is a prognostic indicator for postoperative vision in dogs undergoing retinal reattachment surgery

Hoffman

Sisler

Pappania

et al. 2017

Veterinary Ophthalmology

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“…We used normal beagle dogs for this study because dogs have been frequently used in other studies for preclinical testing of medical devices such as artificial joints. In addition, there have been reports on cataract surgery in dogs [ 17 ] as well as vitrectomy to treat retinal detachment in dogs [ 4 , 6 , 18 , 19 ] at veterinary clinical settings. An experimental study which used dogs for vitrectomy was also described [ 5 ].…”

Section: Discussionmentioning

confidence: 99%

Subretinal implantation of Okayama University-type retinal prosthesis (OUReP<sup>TM</sup>) in canine eyes by vitrectomy

Matsuo

Uchida

Nitta

et al. 2017

The Journal of Veterinary Medical Science

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Okayama University-type retinal prosthesis (OURePTM) is a photoelectric dye-coupled polyethylene film which generates electric potential in response to light and stimulates nearby neurons. This study aims to test surgical feasibility of subretinal implantation and functional durability of dye-coupled films in the subretinal space. The dye-coupled films were implanted subretinally by 25-gauge vitrectomy in the right eye of 11 normal beagle dogs: 2 dogs served for film removal after 5-month film implantation, 3 dogs for film removal after 3-month film implantation, 3 dogs for 3-month film implantation and pathological examination, and 3 dogs for sham surgery. The surface electric potential of the removed dye-coupled films in response to light was measured by the Kelvin Probe system. At surgery, rolled-up dye-coupled films in 5 × 5 mm square size could be inserted into subretinal space of retinal detachment induced by fluid injection with a 38-gauge polyimide tip. Retinal attachment was maintained by silicone oil injection in vitreous cavity. At autopsy, the retina in all dogs maintained the ganglion cell layer, inner and outer nuclear layers while it lost the outer segments in some part. All 5 sheets of removed dye-coupled films maintained the dye color. One sheet of the 5-month implanted film showed proportional increase of surface potential in response to increasing light intensity. Subretinal implantation of OURePTM by vitrectomy was technically feasible in canine eyes, and OURePTM maintained the function of generating light-evoked surface potential after 5 months in subretinal implantation.

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“…It is compatible with literature data about refractive changes with silicone oil fill, which are either hyperopic or myopic, depending on the lens status. 13 – 15 …”

Section: Discussionmentioning

confidence: 99%

Novel approach for phacoemulsification during combined phacovitrectomy

Ewais

Nossair

Ali

2015

OPTH

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PurposeTo evaluate the safety and efficacy of surgeon’s superior sitting position during temporal clear corneal incision (TCCI) phacoemulsification, with a 90° working angle, during combined phacovitrectomy.MethodsProspective interventional case series were performed on 65 eyes of 63 patients. TCCI phacoemulsification was done in all cases (whether right or left eyes), while the surgeon was sitting superiorly to the operating table.Outcome measures includedShift in sitting position, keratometric astigmatism, surgically induced astigmatism, posterior capsule integrity, and intraocular lens centration.ResultsPhacoemulsification was performed completely in all cases (100%). Shift in position to temporal sitting position happened in two cases (3%). The keratometric astigmatism showed mean changes of 1.09 D (0.25–3.75 D) to 0.84 D (0.00–3.25 D) at 1 month, which remained stable at 6 months; 0.84 D (0.16–3.21 D). The surgically induced astigmatism was 0.25 DC (−0.50 to 1.0 DC) at 1 month, which stayed stable at 6 months; 0.25 D (−0.63 D to 0.98 D). Posterior capsular rupture occurred in one case (the second case) (1.5%). The intraocular lens was centered in all cases (100%).ConclusionSuperior sitting TCCI phacoemulsification, with a wide working angle, during combined phacovitrectomy proved safe and easy, without the burden of changing and disrupting the operative setting. The anatomical and optical outcomes were acceptable.

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Refractive state following retinal reattachment and silicone oil tamponade in dogs

Cited by 5 publications

References 30 publications

Electroretinography is a prognostic indicator for postoperative vision in dogs undergoing retinal reattachment surgery

Electroretinography is a prognostic indicator for postoperative vision in dogs undergoing retinal reattachment surgery

Subretinal implantation of Okayama University-type retinal prosthesis (OUReP<sup>TM</sup>) in canine eyes by vitrectomy

Novel approach for phacoemulsification during combined phacovitrectomy

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