RESUMO
The length of exposure to the light source of the operating microscope is a major factor determining retinal phototoxicity. In our experience, for about 20% of the time during cataract surgery, the surgeon is not looking through the oculars. To take advantage of these times, we designed a device, a proximity switch consisting of an infrared sensor mounted between the oculars in the operating microscope. When the surgeon's forehead approaches the microscope to look through the oculars, the sensor increases the illumination; when the surgeon moves away, it is automatically reduced. The resulting decreased overall exposure to light may reduce retinal phototoxicity.
Assuntos
Extração de Catarata/instrumentação , Luz/efeitos adversos , Microscopia/instrumentação , Lesões por Radiação/prevenção & controle , Retina/efeitos da radiação , Humanos , Lentes Intraoculares , Lesões por Radiação/etiologiaRESUMO
Acanthamoebic keratitis is still a rare infection. It occurs in contact lens-wearers, especially when saline is prepared at home from contaminated tap water. There are periods of remission, and occasionally misleading findings resembling those of herpetic keratitis, which make the diagnosis difficult. The isolation of the acanthamoeba is not easy and special culture media are required. Early recognition and aggressive therapy with antiamebic medication and epithelial debridement, often in conjunction with penetrating keratoplasty, are needed. We describe the clinical course, laboratory diagnosis and treatment of 3 patients with acanthamoebic keratitis, 2 men aged 20 and 25, respectively and a women aged 42.
Assuntos
Ceratite por Acanthamoeba , Ceratite por Acanthamoeba/diagnóstico , Ceratite por Acanthamoeba/tratamento farmacológico , Ceratite por Acanthamoeba/cirurgia , Adulto , Desbridamento , Feminino , Humanos , Ceratoplastia Penetrante , MasculinoRESUMO
Neodymium-yttrium-aluminum-garnet (Nd-YAG) laser capsulotomy was performed in three patients with corneal graft. Acute corneal graft rejection was noted in these patients 4 weeks to 4 months after posterior capsulotomy. In one patient, enlargement of the capsulotomy opening was followed by a second episode of corneal graft rejection. We discuss the complications of Nd-YAG laser capsulotomy, and its possible role as a cause for corneal graft rejection.
Assuntos
Extração de Catarata , Rejeição de Enxerto/etiologia , Ceratoplastia Penetrante , Terapia a Laser/efeitos adversos , Cápsula do Cristalino/cirurgia , Doença Aguda , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Recidiva , ReoperaçãoRESUMO
A 27-year-old man with a personality disorder, who did not have keratoconus previously, recently presented with a clinical picture resembling acute corneal hydrops OS three years after silicone oil injection for a complicated retinal detachment. Although self-induced trauma could not be excluded completely, this case might represent a newly described late corneal complication of intracameral silicone oil.
