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H Er

Publications and source records attributed to H Er.

38 records · Page 3Linked to original sources

Retrospective comparison of surgical techniques to prevent secondary opacification in pediatric cataracts.

PURPOSE: To evaluate the effect of different surgical methods for management of the posterior capsule and anterior vitreous on the rate of posterior capsule opacification in pediatric cataracts. METHODS: Charts of 34 children (47 eyes) aged 40 days to 18 years (mean: 8.5 years) who had primary cataract surgery with or without posterior chamber intraocular lens (IOL) implantation during the past 5 years were reviewed. In 26 eyes, cataracts were managed with a posterior continuous curvilinear capsulorhexis, and in 21 eyes, the posterior capsule was left intact. Follow-up averaged 10 months (range: 6.5 months to 5 years). RESULTS: Visually significant secondary cataract developed in nine eyes with intact posterior capsules, and seven eyes required Nd:YAG laser posterior capsulotomy. The average time for YAG capsulotomy postcataract removal in the second group was 4 months. The visual axis remained clear in all eyes that had posterior continuous curvilinear capsulorhexis with or without posterior chamber IOL. Complications such as fibrinoid membrane, stromal edema, posterior synechiae, updrawn pupil, and transient glaucoma occurred in both groups at a similar rate. CONCLUSION: Primary posterior continuous curvilinear capsulorhexis is an effective method for preventing secondary cataract formation in pediatric cataracts.

Adolescent↗

The levels of cytokines and nitric oxide in rabbit vitreous humor after retinal laser photocoagulation.

OBJECTIVE: To determine the levels of nitric oxide (NO) and cytokines such as interleukin 1-beta (IL-1beta), interleukin 6 (IL-6), interleukin 8 (IL-8), and tumor necrosis factor-alpha (TNF-alpha) on vitreous humor following retinal laser photocoagulation. MATERIALS AND METHODS: The rabbits were divided into 3 groups of 4 animals (8 eyes) each. Twelve pigmented rabbit eyes underwent modified grid pattern photocoagulation with a power of 240 mW (group I); 300 mW (group II); and 360 mW (group III). The eyes received 200 burns using a spot size of 200 micro, and duration of 0.2 s. Vitreous humor samples were collected from each eye preoperatively and at 24 and 72 hours after the laser. RESULTS: When compared to preoperative levels, IL-6 levels were increased in all groups; IL-1beta levels were increased significantly only in group III. IL-8 levels were high in groups II and III only at 72 hours (P <0.05). TNFalpha levels were elevated significantly in group II and III only at 24 hours (P <0.05). NO levels were significantly higher than preoperative values in all groups at all times. CONCLUSION: Our results support that especially IL-6, IL-8, and NO levels increase significantly following laser photocoagulation. This preliminary study suggests that IL-6, IL-8, and NO might be dominant contributing factors in the occurrence of the inflammation postoperatively.

Animals↗