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Quantification of Ocular Biomechanics In Ocular Manifestations of Systemic Autoimmune Diseases.
Ocular Immunology and Inflammation 2018 August 8
PURPOSE: To quantify biomechanical change associated with autoimmune diseases using Corvis ST deformation data.
METHODS: Cross-sectional, observational, case control study of 76 patients with systemic autoimmune disease and 21 control subjects. All patients underwent detailed ophthalmic examination with Corvis-ST (Oculus Optikgerate Gmbh, Germany) measurements for biomechanical properties of the eye. Corneal deformation and also deformation caused by the extracorneal tissue were recorded. Using a mathematical formula, the three parameters, namely, corneal stiffness (kc), extracorneal tissue stiffness (kg), and extracorneal tissue viscosity (μg), were defined.
RESULTS: The biomechanical analysis showed that kc and μg were significantly lower in patients with systemic autoimmune disease with eye manifestations than control group. However statistically, it was significant in rheumatoid arthritis (RA) patients only.
CONCLUSION: The new parameters, namely, kc, kg, and μg, can provide a sensitive marker of the ocular activity of the collagen vascular diseases.
METHODS: Cross-sectional, observational, case control study of 76 patients with systemic autoimmune disease and 21 control subjects. All patients underwent detailed ophthalmic examination with Corvis-ST (Oculus Optikgerate Gmbh, Germany) measurements for biomechanical properties of the eye. Corneal deformation and also deformation caused by the extracorneal tissue were recorded. Using a mathematical formula, the three parameters, namely, corneal stiffness (kc), extracorneal tissue stiffness (kg), and extracorneal tissue viscosity (μg), were defined.
RESULTS: The biomechanical analysis showed that kc and μg were significantly lower in patients with systemic autoimmune disease with eye manifestations than control group. However statistically, it was significant in rheumatoid arthritis (RA) patients only.
CONCLUSION: The new parameters, namely, kc, kg, and μg, can provide a sensitive marker of the ocular activity of the collagen vascular diseases.
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