Extensive experience with animals has shown that it is possible to irradiate the iris with a ruby laser without damage to the cornea, lens, or retina (Hallman, Perkins, Watts, and Wheeler, I 968, I969). The possible use of a laser to make an iridotomy for therapeutic purposes was appreciated by Flocks and Zweng (i964), and Zweng, Flocks, Kampany, Silbertrust, and Peppers (I964) reported two att...

A frequently cited theory for the pathogenesis of neovascularization in diabetic retinopathy is that retinal hypoxia and/or ischemia release a factor which stimulates neovascularization. To the authors' knowledge, there is no direct in vivo evidence in the human proving this theory. One hundred and twenty-two diabetic subjects were studied to see whether worsening retinopathy was associated wit...

Fifty patients with retinal detachment accompanied by vitreous haemorrhage, perforating eye injuries, intraocular foreign bodies, massive preretinal retraction,.giant tears greater than 180 degrees, and proliferative retinopathies underwent pars plana vitrectomy, cryocoagulation, scleral buckling, and intravitreal gas injection. Intraoperative complications included minimal to moderate bleeding...

Vascular changes of the iris were studied in 6 patients with chronic anterior uveitis of varying aetiology by means of fluorescein angiography. In 1 case the angiographic findings of the second eye were compared with the histopathological changes in the fellow eye enucleated earlier because of absolute glaucoma. In the milder cases abnormal superficial vessels were seen mainly in relation to th...

— This paper assumes the hypothesis that human learning is perception based, and consequently, the learning process and perceptions should not be represented and investigated independently or modeled in different simulation spaces. In order to keep the analogy between the artificial and human learning, the former is assumed here as being based on the artificial perception. Hence, instead of cho...

A 13-year-old girl with a right intraorbital optic nerve glioma (ONG) was referred to our glaucoma clinic because of uncontrolled intraocular pressure (IOP) in her right eye. The IOP reached as high as 80 mmHg. Several months earlier, she had undergone stereotactic image-guided robotic radiosurgery using the CyberKnife for her ONG; the mass had become smaller after treatment. Her visual acuity ...

E yes with small pupils present a challenge to cataract surgeons. A pupil that fails to dilate can obscure visualization during all stages of phacoemulsification, making surgery more difficult and increasing the incidence of complications such as nucleus drop, vitreous prolapse, and iris tear. Inadequate pupil dilation is often seen in patients with a history of use of miotic agents, chronic uv...

Few reports have described hyphema in association with anterior uveitis. Five cases of anterior chamber haemorrhage are reported in patients with five different anterior uveitic entities: Reiter's syndrome, juvenile chronic arthritis, ankylosing spondylitis, idiopathic anterior uveitis, and herpes simplex. Hyphema has been reported in association with idiopathic non-granulomatous anterior uveit...

The course of diabetic retinopathy following extracapsular cataract extraction with posterior chamber lens implantation in eyes previously treated by laser photocoagulation for diabetic retinopathy was retrospectively studied in 33 eyes (33 patients). In 20 eyes (61%) there was no change in the retinal status postoperatively. In 13 (39%) there was postoperative progression of diabetic retinopat...