Related Experiment Video
Updated: Nov 29, 2025
05:46
Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
Published on: September 20, 2024
654
Topography-guided treatment in regular and irregular corneas
Shreyas Ramamurthy1, B Soundarya1, Gitansha S Sachdev1
1The Eye Foundation, Coimbatore, Tamil Nadu, India.
Indian Journal of Ophthalmology
|November 24, 2020
Summary
Advancements in corneal topography enable precise refractive surgery for regular and irregular corneas. This technology corrects vision by addressing lower and higher-order aberrations, improving visual quality for more patients.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Imaging
Background:
- Refractive surgery has advanced significantly due to improved ablation profiles.
- Corneal imaging reveals higher-order aberrations, impacting visual quality.
- Topographic measurements offer a repeatable, pupil-independent platform for aberration correction.
Purpose of the Study:
- To review current literature and guidelines for topographic treatment of regular and irregular corneas.
- To highlight the role of corneal topography in correcting visual aberrations.
- To discuss advancements in treating conditions like keratoconus and ectasia.
Main Methods:
- Review of current scientific literature and clinical guidelines.
- Analysis of advancements in corneal imaging and ablation profiles.
- Examination of topography-guided treatments combined with collagen cross-linking.
Main Results:
- Topography-guided treatments can correct both lower and higher-order aberrations.
- Improved visual quality is achievable even in patients with seemingly regular corneas.
- Combined treatments enhance the scope for managing irregular corneas (e.g., keratoconus, ectasia).
Conclusions:
- Corneal topography is crucial for personalized refractive surgery.
- Topographic treatments offer enhanced visual outcomes for a wider range of corneal conditions.
- Further research and adherence to guidelines will optimize treatment efficacy.
Related Concept Videos
01:27Open Angle Glaucoma: Treatment
840
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...
840
01:28Angle Closure Glaucoma: Treatment
964
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...
964
01:25Methods of Obtaining Topography
190
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
190