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Difference in cone function between right and left eyes in retinitis pigmentosa Ikuko Tatsumi 1 , Hajime Nakamura 2 , Akio Oishi 2 , Manabu Sasahara 2 , Hiroshi Kojima 2 , Masashi Kurimoto 3 , Atsushi Otani 2 , Nagahisa Yoshimura 2 1Dept of Ophthalmol, Osaka Red Cross Hosp 2Dept of Ophthalmol and Vis Sci, Kyoto Univ Grad Sch of Med 3Dept of Ophthalmol, Kyoto Katsura Hosp pp.911-915
Published Date 2008/6/15
DOI https://doi.org/10.11477/mf.1410102276
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Abstract. Purpose:To report difference in cone function between pairs of eyes in retinitis pigmentosa. Cases and Method:This study was made on 71 patients who were diagnosed with retinitis pigmentosa during a 11-month period. The series comprised 31 males and 40 females. The age averaged 45±16 years. All were bilaterally affected. Cases were evaluated by optical coherence tomography(OCT)and focal macular electroretinogram(fmERG). The visual acuity was expressed as logMAR. Cases were divided into 2 types. Eyes were assigned to type 1 when the junction between inner and outer segment of photoreceptor was less than 2mm and to type 2 when it was 2mm or more. Results:Type 1, which would belong to earlier stage of retinitis pigmentosa, included 48 eyes of 24 patients. The age averaged 48±18 years. Type 2 included 42 eyes of 21 patients. The age averaged 45±17 years. Both types showed a weak correlation between both eyes regarding visual acuity. Amplitude of fmERG between both eyes was weakly correlated in type 1 and strongly in type 2. Both types showed strong correlations between both eyes regarding b and OP waves. Both eyes showed weak correlations between both eyes regarding implicit time. Conclusion:Cone function is equally affected in both eyes from the early stage of retinitis pigmentosa.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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