PT  - JOURNAL ARTICLE
AU  - Farnaz Memarzadeh
AU  - Yan Li
AU  - Brian A Francis
AU  - Ronald E Smith
AU  - Julie Gutmark
AU  - David Huang
TI  - Optical coherence tomography of the anterior segment in secondary glaucoma with corneal opacity after penetrating keratoplasty
AID  - 10.1136/bjo.2006.100099
DP  - 2007 Feb 01
TA  - British Journal of Ophthalmology
PG  - 189--192
VI  - 91
IP  - 2
4099  - http://bjo.bmj.com/content/91/2/189.short
4100  - http://bjo.bmj.com/content/91/2/189.full
SO  - Br J Ophthalmol2007 Feb 01; 91
AB  - Aim: To evaluate secondary glaucoma after penetrating keratoplasty with anterior-segment optical coherence tomography (OCT). Design: Case series. Methods: Four eyes of four patients with corneal opacity and increased intraocular pressure (IOP) were evaluated using high-speed (2000 axial scans/s) OCT at 1.3 μm wavelength. Cross-sectional images of the anterior segment were analysed to assess the cause of increase in pressure. Results: Slit-lamp evaluation of the anterior chamber in all cases was limited by corneal opacity. The OCT imaging allowed visualisation of anterior-segment structures behind the opaque corneas. Using OCT, iris–intraocular lens adhesion and pupillary block were identified as the probable reasons for the increased IOP in one case. Peripheral anterior synechiae and angle closure were identified in the three remaining cases. In two cases, we found that the tip of the aqueous drainage tube was blocked by peripheral anterior synechiae. Conclusions: OCT is similar to ultrasound in that it allows visualisation through opaque corneas. However, OCT has an advantage in that it requires neither contact nor immersion. It is a valuable tool for evaluating the depth of the anterior chamber angle and the causes of secondary angle closure.