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O. Guerrero, M. Gomez–Valcarcel, J. Carmona–Hernandez, M. Ramirez, E. Moragrega–Adame, R. Naranjo–Tackman; Anterior Chamber Depth Changes After Corneal Segment Rings Implantation, Based in a Biomechanical Model . Invest. Ophthalmol. Vis. Sci. 2006;47(13):3593.
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To evaluate if the intrastromal segments surgery produce depth changes at the central and periphery of the anterior chamber of the eye after surgery
Anterior chamber depth of 4 eyes of 4 patients with keratoconus were measured by using an ultrabiomicroscopy system (P 40, Paradigm Medical Industries, Inc, Salt Lake City, USA) before and after corneal segments rings surgery (INTACS, Keravision, Addition Technology, Sunnyvale, CA). We measured before and after surgery the central distance between corneal endothelium and anterior lens capsule, and also the peripheral distance (2 mm from limbus) between corneal endothelium and the pigmented epithelium of the iris. We applied pilocarpine 2% topically in all patients before all studies
Mean central anterior chamber depth before surgery was 3.78 ± 0.52 mm and 3.65 ± 0.23 mm after surgery. Mean peripheral anterior chamber depth before surgery was 2.92 ± 0.31 mm and 2.81 ± 0.02 after surgery. Mean central anterior chamber depth decreased 0.2 ± 0.11 mm and 0.18 ± 0.12 mm at the periphery in 3 patients. In 1 patient the central anterior chamber depth increase 0.3 mm and 0.1 mm at the periphery. All patients decrease their power keratometries ( Mean 5 ± 2 diopters).
Corneal segment rings surgery produce changes at the anterior chamber depth after surgery; this is an important fact to have in mind before perform this surgery.
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