Caroline K. Chee, MBBS, FRCSEd, FRCOphth (Singapore, Singapore), Stephen Teoh, MBBS, MMedOphth, FRCSEd(Ophth) (Singapore, Singapore)

PURPOSE:

(1) To study and characterisethe optical coherence tomography (OCT) findings in dengue maculopathy.
(2) To correlate the findings with visual function and eventual visual outcome.

METHODS:

35 consecutive patients with dengue fever were referred for visual symptoms. They were found to have reduced visual function associated with posterior uveitis and maculopathy. The following parameters were recorded: Snellen visual acuity, biomicroscopy findings, visual fields, fluorescein angiography (FA) and optical coherence tomography(OCT). The visual
function assessed by Snellen acuity and visual fields were correlated with the FA and OCT findings.

RESULTS:

OCT showed three patterns of maculopathy, characterized by
(1) diffuse retinal thickening,
(2)macular edema with foveal elevation associated with subfoveal debris and
(3) cystic separation of the subfoveal retinal pigment epthelium (RPE) layer. Improvement in visualacuity occurred independently of the OCT presentation. The scotomata tended to persist the longest in pattern (3) and the shortest in pattern (1).

CONCLUSION:

Three patterns of macular changes could be detected in dengue maculopathy. These patterns may be useful in characterisation of the disease as well as monitoring and prognosis of the visual defect.