Circumpapillary structure-function relationships with microperimetry a | OPTH – Dove Medical Press


Yoshiyuki Kita,1 Gábor Holló,2 Akiko Murai,1 Ritsuko Kita,1 Tsunehiro Saito,1 Akito Hirakata1

1Department of Ophthalmology, Kyorin University School of Medicine, Tokyo, Japan; 2Department of Ophthalmology, Semmelweis University, Budapest, Hungary

Purpose: To compare the relationships between circumpapillary microperimetry (MP)-sensitivity measurements and various circumpapillary retinal thickness parameters in healthy and primary open-angle glaucoma (POAG) eyes.
Methods: In 14 eyes of 14 healthy subjects and 22 early–moderate POAG eyes of 22 patients, circumpapillary optical coherence tomography thickness measurements (RS-3000 Advance OCT, NIDEK) of the retinal nerve fiber layer (cpRNFL), total retina (cpTR), and ganglion cell complex (cpGCC) and outer retina (cpOR) and circumpapillary MP-sensitivity measurements (MP-3 microperimeter, NIDEK) were made in 12 sectors of identical circumpapillary circles. The structure-function relationship was investigated in each sector.
Results: Statistically significant correlations with circumpapillary MP-sensitivity values were found for cpRNFL in five sectors, cpTR in nine sectors, cpGCC in nine sectors, and cpOR in three sectors. The structure-function relationship was strong (r=0.4–0.69) in three sectors for cpRNFL, in six for cpTR, in four for cpGCC, and in one for cpOR. The relationship was very strong (r>0.7) in one sector for cpRNFL, cpTR, and cpGCC, and in no sectors for cpOR. The very strong relationships all occurred in sector 5 (inferotemporal sector).
Conclusion: In our pilot study, the circumpapillary structure-function relationship was more extensive for cpTR thickness and cpGCC thickness than for cpRNFL thickness, which suggests that the former parameters may require greater attention in structure-function research into glaucoma.

Keywords: circumpapillary ganglion-cell complex, circumpapillary total retina thickness, circumpapillary retinal nerve-fiber-layer thickness, glaucoma, microperimetry sensitivity, structure-function relationship

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