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ISSN 1561-3011 (Electronic)

2011, Number 3

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Rev Cubana Invest Bioméd 2011; 30 (3)

Modifications of posterior ocular anterior segment with peripheral laser iridotomy

Fernández AL, Álvarez CG, Piloto DI, Fumero GF, Padilla GCM, Vinardell PS, Obret MI, Díaz ÁY

Language: Spanish
References: 21
Page: 301-311
PDF size: 244.02 Kb.


ABSTRACT

OBJECTIVE: To evaluate post-laser peripheral iridotomy variations of anterior ocular segment by anterior segment optical coherence tomography.
METHOD: Prospective observational case series in 30 patients (46 eyes) diagnosed with primary angle- closure suspect. The tomography was obtained pre-operative and at seven days post-operative by SL-OCT Heidelberg Engineering. Quantitative variables related to anterior segment structures were analyzed before and after the laser peripheral iridotomy treatment.
RESULTS: There were no pre-operative statistical differences between quadrants. In the pos-op period all variables showed significant differences particularly at inferior and nasal quadrant, except for iris-scleral spur distance (p= 0.926) and angle opening distance at 750μm (p= 0.069). Pos-laser changes were significant for variables related to the angle (p= 0.000), anterior chamber volume (p= 0.000), and anterior chamber depth (p= 0.011). The average increase in post-laser anterior chamber angle was 8.7 ± 5.9 degrees and it was correlated negatively to preoperative iris-scleral spur distance (p= 0.007), angle opening distance at 500μm (p= 0.031), trabecular-iris space area at 500 μm (p= 0.003), and 750μm (p= 0.026). Inter-eye differences were non significant for post-operative changes.
CONCLUSION: Laser iridotomy is effective to increase the anterior chamber angle, and it is associated with the increase in anterior chamber volume and central depth in primary angle-closure suspect


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