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Updated: Feb 5, 2026

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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
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COMPARISON OF SPECTROSCOPIC PROPERTIES OF INTRAOCULAR FLUID IN PATIENTS WITH CATARACT AND PRIMARY OPEN-ANGLE GLAUCOMA
Summary
Spectroscopic analysis of aqueous humor revealed higher absorbance at 202 nm in patients with primary open angle glaucoma (POAG) and cataract compared to those with cataract alone. This suggests metabolite accumulation in POAG patients, potentially due to reduced aqueous humor flow.
Area of Science:
- Ophthalmology
- Biochemistry
- Spectroscopy
Background:
- Cataract and primary open angle glaucoma (POAG) are common ocular conditions.
- Aqueous humor composition can be altered in ocular diseases.
- Spectroscopic analysis offers a method to investigate biochemical changes in aqueous humor.
Purpose of the Study:
- To compare the spectroscopic properties of aqueous humor in patients with cataract versus those with a combination of cataract and POAG.
- To identify potential spectroscopic markers associated with POAG in aqueous humor.
Main Methods:
- Aqueous humor samples were collected from 60 cataract patients and 36 patients with cataract and POAG during surgery.
- Absorption spectra were measured in the 190-1100 nm range.
- Spectra were analyzed for absorption bands and absorbance values at specific wavelengths.
Main Results:
- Two main absorption bands were observed at 202 nm and 267 nm.
- Mean absorbance at 202 nm was significantly lower in cataract patients without POAG compared to those with POAG.
- No significant difference in mean absorbance at 267 nm was found between the groups.
Conclusions:
- Elevated aqueous humor absorbance at 202 nm in POAG patients may indicate metabolite accumulation.
- This accumulation could be linked to decelerated aqueous humor flow in POAG.
- Spectroscopic analysis of aqueous humor shows potential for differentiating ocular disease states.
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