Related Experiment Videos
Central corneal thickness and normal tension glaucoma: a cross-sectional study
Michael Sullivan-Mee1, Kathy D Halverson, Mollie C Saxon
1Albuquerque VA Medical Center, Albuquerque, New Mexico 87108, USA. Michael.sullivan-mee@med.va.gov
Optometry (St. Louis, Mo.)
|March 4, 2006
Summary
Thinner central corneal thickness (CCT) is linked to the presence of normal-tension glaucoma (NTG)-related visual field loss. However, CCT does not predict the severity of this vision impairment in NTG patients.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Corneal Biomechanics
Background:
- Central corneal thickness (CCT) is a known risk factor for primary open-angle glaucoma (POAG) development.
- The relationship between CCT and normal-tension glaucoma (NTG) remains less understood.
- This study investigates the association between CCT and NTG.
Purpose of the Study:
- To explore the relationship between central corneal thickness (CCT) and normal-tension glaucoma (NTG).
- To determine if CCT is associated with the presence or severity of visual field loss in NTG patients.
Main Methods:
- Retrospective analysis of NTG and NTG suspect patients.
- Categorization of subjects based on visual field loss severity and CCT.
- Statistical analyses including ANOVA and regression to assess CCT and IOP variables.
Main Results:
- Mean CCT was significantly thicker in NTG suspects (no visual field loss) compared to NTG patients with visual field loss.
- A robust, independent association was found between CCT and the presence of NTG-related visual field loss.
- No significant relationship was observed between CCT and the severity of visual field loss in NTG.
Conclusions:
- Central corneal thickness is significantly associated with the presence of glaucomatous visual field loss in eyes with normal intraocular pressure.
- CCT does not appear to predict the severity of visual field loss in normal-tension glaucoma.
- Further prospective studies are needed to confirm these findings.
Related Concept Videos
01:25Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
01:27Open Angle Glaucoma: Treatment
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
01:28Angle Closure Glaucoma: Treatment
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...