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Usma Chatha, Priyamvada M Pitale, Varun Patel, Lalita Gupta, Michael Waisbourd, Michael Pro; Macular thickness changes using Spectral Domain Optical Coherence Tomography after glaucoma surgery. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):4532.
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Reversal of disc cupping following glaucoma surgery is known to occur for decades, however there is limited data on its impact on the macula. The purpose of this study was to assess macular thickness changes following glaucoma surgery using macular Spectral Domain Optical Coherence Tomography (SD-OCT).
A retrospective chart review of patients who underwent glaucoma surgery between January 2012 and February 2013 was conducted. Patients were included if they had an SD-OCT “Asymmetry Analysis” scan (Spectralis, Heidelberg Engineering, Carlsbad, CA, USA) within 1 year prior to surgery and at least one scan following surgery. Patients with maculopathy were excluded. Outcome measures were macular thickness and IOP.
The study consisted of twelve patients. Postoperative scans were conducted after an average of 10.8 (+5.3) months. Nine out of 12 patients (75%) showed increases in macular thickness. The mean macular thickness increased from 263μm to 272μm (p=0.079) following a significant reduction in IOP (p<0.001). There was a significant increase in macular thickness in the superior hemisphere (p=0.043). Figure 1 shows the SD-OCT scans of a patient with a substantial increase in macular thickness following surgery.
This pilot study found a significant increase in mean superior hemifield macular thickness following glaucoma surgery.
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