| Asymptomatic Unexplained Visual Field Loss Diagnosed as Early Retinitis Pigmentosa without Pigmentation: A Case Report. |
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Changhwan Lee, Moohwan Chang, Sungeun Kyung |
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Department of Ophthalmology, Dankook University Hospital, Dankook University Medical College, Cheonan, Korea. kseeye@hanmail.net |
| 상세불명의 시야이상 환자에서 진단된 무색소 초기 망막색소변성 1예 |
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이창환⋅장무환⋅경성은 |
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단국대학교 의과대학 단국대학교병원 안과 |
Correspondence:
Sungeun Kyung,
Email: kseeye@hanmail.net
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Received: 26 November 2015 • Revised: 16 March 2016 • Accepted: 3 June 2016 |
| Abstract |
PURPOSE
We report a case of asymptomatic unexplained visual field loss diagnosed as early retinitis pigmentosa (RP) without pigmentation. CASE SUMMARY: A 33-year-old woman was referred to us with a constricted visual field (C24-2) before laser-assisted in-situ keratomileusis surgery. The visual field test (C30-2) revealed significantly decreased sensitivity between 15 to 25 degrees in both eyes. Close fundus examination revealed a subtle greyish retinal atrophic lesion along the vascular arcade and fluorescein angiography revealed a window defect in accordance with a retinal atrophic lesion in both eyes. Optical coherence tomography showed decreased retinal thickness around the macula. Electroretinogram revealed decreased b waves in rod response. Based on these findings, we diagnosed the patient with early RP without pigmentation. CONCLUSIONS: The possibility of early RP without pigmentation presenting as slight atrophy around the macula without significant pigmental degeneration should also be considered if a patient presents with peripheral visual field constriction without other symptoms. The ophthalmologist should ensure that the location of the visual field defect matches the location of the lesion. In addition, a detailed fundus examination with macular optical coherence tomography can be helpful to diagnose such a lesion. |
| Key Words:
Constricted central visual field;Early retinitis pigmentosa (RP) without pigmentation;Electroretinogram;Macular optical coherence tomography |
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