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Intraocular pressure increments after cataract extraction in glaucomatous eyes with functioning filtering blebs
T Wygnanski-Jaffe1, A Barak, S Melamed
1Goldschleger Eye Institute, Sam Rothberg Glaucoma Center, Sheba Medical Center, Sackler School of Medicine, Tel-Aviv University, Israel.
Ophthalmic Surgery and Lasers
|August 1, 1997
Summary
Cataract extraction in glaucoma patients with filtering blebs increases intraocular pressure (IOP). While trabeculectomy
Area of Science:
- Ophthalmology
- Glaucoma Research
- Surgical Outcomes
Background:
- Glaucoma management often involves trabeculectomy to lower intraocular pressure (IOP).
- Cataract surgery is common in patients with glaucoma.
- The impact of cataract extraction on IOP in eyes with prior trabeculectomy is not fully understood.
Purpose of the Study:
- To investigate the effect of cataract extraction on intraocular pressure (IOP).
- To assess IOP changes in glaucoma patients with functioning filtering blebs after cataract surgery.
Main Methods:
- Retrospective review of 22 patients (25 eyes) with glaucoma and functioning filtering blebs.
- Patients underwent cataract extraction via corneal incisions.
- Data collected included visual acuity, IOP, bleb status, and medication use for at least 18 months post-surgery.
Main Results:
- A statistically significant increase in mean intraocular pressure (IOP) was observed 3 months post-cataract extraction.
- IOP elevations ranged from 2.8 to 5.4 mm Hg at various follow-up points (3-18 months).
- Postoperative IOP remained significantly lower than pre-trabeculectomy levels.
Conclusions:
- Cataract extraction in patients with functioning filtering blebs leads to a sustained increase in IOP.
- Cataract surgery does not negate the IOP-lowering effect of trabeculectomy.
- The procedure tends to elevate the baseline post-trabeculectomy IOP.