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All Journal IJRETINA - International Journal of Retina
Mohamad Sidik
Universitas Indonesia, Cipto Mangunkusumo National Central General Hospital
Health Professions Medicine & Pharmacology Public Health

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Comparison of Wave Amplitude, Implicit Time and Comfort Level Using Dawson-Trick-Litzkow, Jet and Dencott Electrodes in Electroretinography in Normal Adults Theresia Yinski Pistari Gondosari; Mohamad Sidik; Syntia Nusanti
International Journal of Retina Vol 3 No 2 (2020): International Journal of Retina (IJRetina) - INAVRS
Publisher : Indonesian Vitreoretinal Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35479/ijretina.2020.vol003.iss002.123

Abstract

Introduction: Several electrodes can be used in standard full-field electroretinography (ERG). However, there are no standard values for Indonesians yet. Therefore, this research aims to establish normal values, to compare them and to compare comfort levels using DTL, Dencott and Jet electrodes in Indonesian adults. Method: Through convenient sampling, 58 normal Indonesian subjects, age 19-49 years old were selected. ERG amplitudes and implicit time values were measured according to recommendations by the International Society for Clinical Electrophysiology of Vision (ISCEV). Evaluations consisted of scotopic 0.01, 3.0, OP and photopic 3.0 flicker. After examination, all subjects filled in a questionnaire about comfort levels, adopted from the visual analog scale. Result: We observed a statistically significant difference in ERG normal values between electrodes with higher wave amplitudes and longer implicit times in Dencott and jet electrodes, compared to DTL electrodes. Jet and DTL electrodes are more comfortable than Dencott electrodes for Indonesian adults in standard full-field electroretinography. Conclusion: DTL electrodes give the lowest wave amplitudes and the shortest implicit times and are the most comfortable electrode compared to Dencott and ERG jet electrodes, in standard full-field electroretinography in Indonesian adults.
A Rare Case of Unilateral Retinitis Pigmentosa Syntia Nusanti; Mohamad Sidik; Ari Djatikusumo; Elyas Aditya
International Journal of Retina Vol 2 No 1 (2019): International Journal of Retina (IJRetina) - INAVRS
Publisher : Indonesian Vitreoretinal Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35479/ijretina.2019.vol002.iss001.52

Abstract

Introduction: Retinitis pigmentosa (RP) is a hereditary disorder that diffusely involve photoreceptor and retinal pigment epithelial (RPE). It is characterized by progressive visual field loss and abnormal ERG. Unilateral RP is a rare condition that is usually sporadic. Clinical presentation and ancillary test results are similar to bilateral RP, with only one eye affected. In making the diagnosis of unilateral RP, clinicians must be able to rule out secondary causes, document a normal ERG in the unaffected eye, and follow-up the patient for at least 5 years to rule out bilateral but asymmetric disease. the aim of this case report is how to diagnose a rare case unilateral RP from clinical examination and ancillary tests. Methods: We report a case of a 33-year-old female with slowly progressive restriction of visual field of the left eye in the last one year before admission. Ophthalmological examination of the left eye revealed bone spicules spreading to peripheral fundus. Visual field examination revealed severely constricted visual field of the left eye. The multifocal electroretinogram (mfERG) examination showed severely depressed ERG function with reduced foveal responses. The fellow eye was within normal limit. Results: Patient was diagnosed with unilateral RP and must be followed-up for at least five years to rule out bilateral yet asymmetric disease. Making diagnosis of unilateral RP become one of the challenging case. Clinicians must be able to rule out the secondary causes that also have unilateral pigmentary retinal degeneration. Conclusion: With a good clinical examination and some simple ancillary tests, we could correctly diagnose unilateral RP. However, in this case we still need five years follow up to rule out bilateral RP yet asymmetric disease.
Co-Authors Ari Djatikusumo Elyas Aditya Syntia Nusanti Theresia Yinski Pistari Gondosari