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   1993| October-December  | Volume 41 | Issue 4  
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Extracapsular cataract extraction : Surgical techniques
Surendra Basti, Abhay R Vasavada, Ravi Thomas, Prema Padhmanabhan
October-December 1993, 41(4):195-210
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The biology of cataract. The Hyderabad cataract research group
D Balasubramanian, Aashish K Bansal, Surendra Basti, KS Bhatt, JS Murthy, C Mohan Rao
October-December 1993, 41(4):153-171
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Microphthalmos with cyst : A clinical study
PK Agrawal, Hemant Kumar
October-December 1993, 41(4):177-179
Defects in closure of embryonic fissure and invagination of optic vesicle results in varied clinical presentation of microphthalmos with cyst. In our study, three patients had microphthalmos with cyst in one of their orbits. The cyst presented either as a swelling in the lower lid or as a sinus with purulent discharge associated with absent or small sized eyeball. The microphthalmic eye showed a spectrum of posterior segment abnormalities such as retinal disorganisation, gliosis, choroidal, and scleral coloboma. Microscopically, the cyst connected to the coloboma consisted of an outer layer of fibrovascular tissue and an inner gliotic neuroectodermal layer. The treatment consisted of excision of cyst alone or of microphthalmic eye with cyst. The use of conformers was mandatory after removal of cystic eyeball for near normal development of both orbits to maintain facial symmetry in our paediatric patients.
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Post-penetrating keratoplasty glaucoma
G Chandra Sekhar, Prateep Vyas, Rukmini Nagarajan, Anil K Mandal, Satish Gupta
October-December 1993, 41(4):181-184
To study the risk factors in the development of glaucoma following penetrating keratoplasty, we retrospectively analysed 190 eyes of 185 consecutive patients who had undergone surgery during 1990. The donor button was larger by 0.2 mm and 0.5 mm in phakia and aphakia/pseudophakia patients, respectively. Over a mean follow-up period of 14.5 months, 52 of the 190 eyes (27.4%) either developed glaucoma de novo or had worsening of preexisting glaucoma. Of these 52 eyes, 38 were managed medically and 14 required surgery. From our study, aphakia (37%), pseudophakia (24%), preexisting glaucoma (81.8%), and regrafting (43.18%) were found to be the significant risk factors in the development of glaucoma following penetrating keratoplasty.
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Incidence of complications following 5-fluorouracil with trabeculectomies
Ravi Thomas, Aby Jacob, Renu Raju, Stephen C Gieser, Subir Sen
October-December 1993, 41(4):185-186
To investigate the incidence of complications reportedly caused by the use of 5-fluorouracil (5-FU) in glaucoma filtering surgery, we performed trabeculectomy with 5-FU on 57 eyes of 56 patients with advanced glaucoma. The mean preoperative intraocular pressure was 34.8 mm Hg. The most frequent complication encountered was superficial punctate keratopathy (26%), followed by shallowing of the anterior chamber (12%), choroidal detachment (9%), and flap retraction (7%). We, however, did not encounter any cases of confluent corneal epithelial defect, subepithelial scarring, or striate melanokeratosis which are usually described with the use of 5-FU. With a mean follow-up of 7.1 months, an intraocular pressure less than 16 mm Hg without hypotensive therapy were achieved in 73.7% of cases, and less than 21 mm Hg without hypotensive therapy in 86%. Considering the low incidence of complications and the high success rate, we recommend the use of 5-FU in routine glaucoma filtering surgery
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Acid phosphatase and lipid peroxidation in human cataractous lens epithelium
Abhay R Vasavada, Prajitha Thampi, Savita Yadav, UM Rawal
October-December 1993, 41(4):173-175
The anterior lens epithelial cells undergo a variety of degenerative and proliferative changes during cataract formation. Acid phosphatase is primarily responsible for tissue regeneration and tissue repair. The lipid hydroperoxides that are obtained by lipid peroxidation of polysaturated or unsaturated fatty acids bring about deterioration of biological membranes at cellular and tissue levels. Acid phosphatase and lipid peroxidation activities were studied on the lens epithelial cells of nuclear cataract, posterior subcapsular cataract, mature cataract, and mixed cataract. Of these, mature cataractous lens epithelium showed maximum activity for acid phosphatase (516.83 moles of p-nitrophenol released/g lens epithelium) and maximum levels of lipid peroxidation (86.29 O.D./min/g lens epithelium). In contrast, mixed cataractous lens epithelium showed minimum activity of acid phosphatase (222.61 moles of p-nitrophenol released/g lens epithelium) and minimum levels of lipid peroxidation (54.23 O.D./min/g lens epithelium). From our study, we correlated the maximum activity of acid phosphatase in mature cataractous lens epithelium with the increased areas of superimposed cells associated with the formation of mature cataract. Likewise, the maximum levels of lipid peroxidation in mature cataractous lens epithelium was correlated with increased permeability of the plasma membrane. Conversely, the minimum levels of lipid peroxidation in mixed cataractous lens epithelium makes us presume that factors other than lipid peroxidation may also account for the formation of mixed type of cataract.
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Nasal septal chondrosarcoma with visual loss
K Sharma, A Kaur, HC Taneja, I Tyagi, R Pandey
October-December 1993, 41(4):189-191
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Ichthyosis-associated spheroid corneal degeneration in HLA-DR identical brothers
K Sharma, S Agrawal, RK Sharma
October-December 1993, 41(4):191-193
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Acanthamoeba keratitis in hard contact lens wearer
M Srinivasan, Prabjot Channa, CV Gopala Raju, C George
October-December 1993, 41(4):187-188
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Subconjunctival cysticercus cellulosae
RY Singh
October-December 1993, 41(4):188-189
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The cataract problem
Gullapalli N Rao
October-December 1993, 41(4):151-152
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