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Abstract #91730 Published in IGR 21-4
Relationship between corneal stiffness parameters and lamina cribrosa curvature in normal tension glaucoma
Sun Y; Guo Y; Cao K; Zhang Y; Xie Y; Pang R; Shi Y; Wang H; Wang NEuropean Journal of Ophthalmology 2020; 0: 1120672120982521
PURPOSE: To evaluate the relationship between corneal biomechanical parameters and lamina cribrosa (LC) curvature in normal tension glaucoma (NTG). METHODS: 95 eyes of 56 NTG patients were enrolled in this prospective, observational study. Corneal biomechanical parameters, including stiffness parameters at applanation 1 (SP-A1), deformation amplitude ratio (DA ratio), inverse concave radius and biomechanically corrected intraocular pressure estimate (bIOP), were captured using the Corneal Visualization Scheimpflug Technology instrument (Corvis-ST). LC curvature was evaluated by mean adjusted LC curvature index (maLCCI) averaged by the measurements on 12 radial B-scan images obtained using swept-source optical coherence tomography (SS-OCT). Linear mixed models were constructed to assess the relationship between corneal biomechanical parameters and LC curvature. RESULTS: The mean age of participants was 51.04 ± 13.74 years (range, 24-82 years). The SP-A1 and maLCCI were 93.50 ± 13.82 mm Hg/mm and 7.57 ± 1.58, respectively. In univariate and multivariate analysis, SP-A1 ( < 0.001 and = 0.001) and age ( = 0.010 and = 0.024) were both significantly associated with maLCCI. The LC curvature increased with softer cornea demonstrated by lower SP-A1 and younger eyes. There was no statistical significance interaction between SP-A1 and age ( = 0.194). CONCLUSIONS: The greater posterior LC curvature was associated with lower corneal stiffness parameters and younger eyes in NTG patients. CLINICAL TRIAL REGISTRATION: Chinese Clinical Trial Registry, ChiCTR1900021465.
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Classification:
9.2.4 Normal pressure glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
2.2 Cornea (Part of: 2 Anatomical structures in glaucoma)
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
2.3 Sclera (Part of: 2 Anatomical structures in glaucoma)