Early effect of argon laser trabeculoplasty on human meshwork: an electron microscopic study

An electron microscopic study, using transmission electron microscopy, was performed on trabeculectomy specimens obtained from human phakic eyes scheduled for trabeculectomy for uncontrolled primary open angle glaucoma, few hours to one week after Argon Laser Trabeculoplasty [ALT]. The early results showed disruption of trabecular beams, coagulative necrosis within the beam core, rupture of the endothelial cells covering the beam and heavy dispersion of tissue dibris and pigment granules. The one week specimens showed collagen fiber deposition as well as decrease in tissue debris. The cornea! endothelium nearby the laser site was damaged. No inflammatory cells were seen in any of the specimen examined

Morphological and electrical changes of retinal cells exposed to alternating magnetic field

The effect of alternating magnetic field [AMF] on dark adapted chicken retina was studied. Exposure to different flux densities [5 to 60 G] had shown induced specific differences in the common components of the electroretinogram [ERG]. The value of AMF which caused these changes in ERG components was found to be around 30 G. In addition, the morphological changes in the different layers of chicken retina were determined histologically after the application of light or AMF of intensity 30 G. Semithin sections and photographs of the retina treated with light stimulus and those treated with AMF stimulus as well as control retinae were presented

Histology of the normal and cataractous lens

The histological picture of the normal lens taken from cadaver eyes were fully presented and discussed. In addition, the microscopic change of different types of mature cataract, either on its own [senile mature cataract] or complicated with other systemic diseases as glaucoma and diabetes, was also presented in this study. All lenses were subjected to three different types of decalcification to soften the lens and to overcome the difficulty of obtaining good histological sections. Also, different staining techniques were employed and they proved to be useful in studying both the normal structure of the lens and its histological changes in cataract

eye and alloxan diabetes, a histological study on the cornea, conjunctiva and uveal tract

Diabetes was induced in rabbits by injecting alloxan in their ear vein. These animal were classifid into two groups, one groups were sacrificed after 3 months, while the other groups were sacrificed after 5 months. A third group was considered as a control. The eyes were enucleated and prepared for histological study after staining with haematoxylin and eosin, and PAS stains. The eyes were examined for their cornea, conjunctivas, irides, ciliary bodies ans choroids. The changes, which were met with, were identified and discussed