Browsing Head, Neck, Eyes and Plastics by Author "Chen, Hean"
An unusual cause for an optic disc haemorrhage.Baxter, Julia; Kailasanathan, Anusha; Chen, Hean (2011-02)A 51-year-old male on chemotherapy for myeloma presented initially with a unilateral optic disc haemorrhage and signs of optic neuropathy. This rapidly progressed to affect both eyes and within a few days he developed retinal features suggestive of progressive outer retinal necrosis. He was treated with intravenous acyclovir that was subsequently changed to ganciclovir when serological tests for cytomegalovirus were found to be positive for immunoglobulin M antibodies. His visual loss continued to deteriorate despite treatment, and he subsequently developed a retinal detachment in one eye. The causes of optic neuropathy in immunocompromised patients and the importance of eliminating an infective cause are discussed
Epiretinal Membrane Surgery Outcomes in Eyes with Subretinal Drusenoid Deposits: A Case Control Study.Gandhewar, Ravikiran; Chen, Hean (2018-12)PURPOSE: To evaluate outcomes of epiretinal membrane (ERM) surgery in eyes with subretinal drusenoid deposits (SRDDs) and to compare them with those with isolated ERM. DESIGN: Retrospective case-control study of consecutive patients who underwent pars plana vitrectomy (PPV) with ERM peeling. PARTICIPANTS: Twenty-five patients with SRDDs on spectral-domain (SD)-OCT who underwent surgery for ERM were included in the study. From the same cohort, for each case, we selected 2 age-matched control participants (50 eyes with isolated ERM). Preoperative best-corrected visual acuity (BCVA) also was matched as closely as possible. METHODS: All participants underwent PPV and ERM peel for primary ERM. MAIN OUTCOME MEASURES: Postoperative BCVA, improvement in BCVA, preoperative and postoperative central macular thickness, surgical complications, and development of age-related macular degeneration (AMD) were recorded. RESULTS: At final examination, mean postoperative BCVA was significantly less for eyes with SRDDs (0.51 logarithm of the minimal angle of resolution [logMAR] vs. 0.21 logMAR; P = 0.0001). Eyes with SRDDs demonstrated less improvement in BCVA after ERM surgery (0.13 logMAR vs. 0.30 logMAR; P = 0.0032). Eyes with SRDDs were significantly less likely to gain 2 or more Snellen lines of BCVA after ERM surgery (28% vs. 56%; P = 0.028). Three of 25 patients (12%) undergoing ERM surgery showed worsening of Snellen BCVA by 2 lines or more. Three of 25 eyes (12%) with SRDDs demonstrated advanced AMD after surgery, compared with 0 participants in the control group (P = 0.034). CONCLUSIONS: Epiretinal membrane surgery in eyes with SRDDs is associated with less favorable visual outcomes. Fewer patients demonstrate gain in BCVA, whereas a significant number show a deleterious decline. After surgery, AMD incidence seems high and patients may have an increased risk of raised intraocular pressure. These findings require further study to establish whether this represents a causal relationship. Surgeons should be vigilant for these complications. Appropriate patient counseling during the consenting process must be made.