Peripapillary Retinoschisis in Glaucoma Patients

Area of Science:

• Ophthalmology
• Glaucoma Research
• Retinal Imaging

Background:

• Peripapillary retinoschisis is a condition affecting the retina near the optic disc.
• Accurate measurement of retinal nerve fiber layer (RNFL) thickness is vital for diagnosing and monitoring glaucoma.
• Spectral-domain optical coherence tomography (SD-OCT) is a key imaging technology in ophthalmology.

Purpose of the Study:

• To investigate the occurrence and characteristics of peripapillary retinoschisis in glaucoma patients.
• To evaluate the impact of peripapillary retinoschisis on RNFL thickness measurements obtained via SD-OCT.
• To determine the clinical significance of retinoschisis in the context of glaucoma assessment.

Main Methods:

• Review of circumpapillary RNFL (cpRNFL) B-scan images from 940 glaucoma patients and 801 glaucoma-suspect patients using SD-OCT.
• Analysis of structural and clinical features of identified retinoschisis areas.
• Comparison of RNFL thickness measurements at the time of retinoschisis diagnosis versus follow-up visits.

Main Results:

• Peripapillary retinoschisis was identified in 3.1% of glaucoma patients and 0.87% of glaucoma-suspect patients.
• In glaucomatous eyes, retinoschisis was associated with the optic disc and RNFL defects.
• RNFL thickness measurements were significantly greater during retinoschisis episodes, particularly in the inferior temporal quadrant, compared to follow-up scans.

Conclusions:

• Peripapillary retinoschisis can lead to an overestimation of RNFL thickness in glaucoma patients.
• Close examination of cpRNFL B-scan images is essential to accurately interpret RNFL thickness measurements in the presence of retinoschisis.
• This finding highlights the importance of considering structural anomalies when assessing glaucoma progression using OCT.