This study aims to look into the change of the corneal biomechanical properties in patients undergoing insertion of the Ex-PRESS mini shunt or trabeculectomy for medically uncontrolled glaucoma
The patients in the study were divided into two groups. In group 1 the patients had the Ex-PRESS mini shunt inserted in the operated eye and in group 2 the patients underwent standard trabeculectomy. The corneal biomechanical properties were measured with the Ocular Response Analyzer before surgery and at 1, 6 and 12 months after surgery. The corneal biomechanical properties measured were the Corneal Hysteresis (CH) and the Corneal Resistance Factor (CRF). The change of the CH and CRF was compared in each group before and after surgery (at the aforementioned predetermined time points) and between the two groups. The intraocular pressure was also measured with the Goldmann applanation tonometer at the same time points and the change was compared before and after surgery in each group and between the two groups.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
26
Change of corneal biomechanical properties
Two corneal biomechanical properties were measured with the use of the Ocular Response Analyzer (ORA): the Corneal Resistance Factor (CRF) and the Corneal Hysteresis (CH). These two indicators were measured before surgery and at 1, 6 and 12 months after surgery
Time frame: 12 months
Change of Intraocular Pressure
The Intraocular Pressure was measured with the Goldmann applanation tonometer before surgery and at 1, 6 and 12 months after surgery
Time frame: 12 months
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