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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Perimetric severity in hospital-based and population-based glaucoma patients
S Ve Ramesh1, Ronnie George, Prema Raju
1Glaucoma Project, Vision Research Foundation, Sankara Nethralaya, Chennai, India.
Clinical & Experimental Optometry
|July 16, 2010
Summary
Newly diagnosed glaucoma patients at a hospital had higher intraocular pressure (IOP) and more severe visual field defects compared to those in a population study. Hospital-based study results on glaucoma severity require careful interpretation.
Area of Science:
- Ophthalmology
- Public Health
- Glaucoma Research
Background:
- Glaucoma severity assessment often relies on hospital-based data.
- Population-based studies offer a different perspective on disease prevalence and severity.
Purpose of the Study:
- To compare the severity of primary glaucoma in newly diagnosed patients at a hospital-based glaucoma care center (HBGS) with age-matched individuals from a population-based study (CGFS).
Main Methods:
- Included newly diagnosed primary glaucoma patients from HBGS and age/gender-matched controls from CGFS.
- Comprehensive ocular examinations, including Humphrey visual field (HVF) testing (24-2 SITA Standard).
- Glaucoma defined by intraocular pressure (IOP), vertical cup-to-disc ratio (VCDR), and visual field parameters; analysis at the third follow-up visit.
Main Results:
- Forty-seven age-matched subjects were analyzed.
- HBGS patients exhibited significantly higher IOP (mean difference: 2.80 mmHg, p=0.04).
- HBGS patients showed more severe visual field defects, with statistically significant differences in mean deviation (p=0.036) and pattern standard deviation (p=0.0001).
Conclusions:
- Hospital-based glaucoma patients present with higher IOP and more advanced visual field loss than those in population-based studies.
- Findings suggest caution when interpreting glaucoma severity and progression rates from hospital-based research alone.
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