Related Experiment Video
Updated: Jul 16, 2026
05:46
Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
Published on: September 20, 2024
Retreatment of hyperopia after primary hyperopic LASIK.
Julio Ortega-Usobiaga1, Rosario Cobo-Soriano, Fernando Llovet
1Clínica Baviera, Instituto Oftalmológico Europeo, Bilbao, Bizkaia, Spain. jortega@clinicabaviera.com
Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|March 1, 2007
Summary
Retreatment after primary hyperopic LASIK (laser-assisted in situ keratomileusis) is influenced by the amount of correction. Lower initial corrections yield better efficacy and safety outcomes for hyperopic LASIK retreatments.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Hyperopic LASIK aims to correct farsightedness using laser technology.
- Undercorrection is a common reason for retreatment in hyperopic LASIK.
- Evaluating retreatment factors is crucial for optimizing patient outcomes.
Purpose of the Study:
- To identify factors influencing the success of retreatment procedures for primary hyperopic LASIK.
- To analyze the impact of initial and retreatment diopter corrections on outcomes.
Main Methods:
- Retrospective analysis of 86 eyes from 61 patients undergoing hyperopic LASIK retreatment.
- Procedures performed using the Technolas Keracor 217C excimer laser with flap lifting.
- Preoperative spherical equivalent refraction averaged +3.05 D.
Main Results:
- Post-retreatment spherical equivalent refraction averaged -0.07 D.
- Retreatment efficacy improved when primary LASIK correction was less than +3.00 D.
- Retreatment safety decreased with primary correction > +1.00 D or combined correction > +4.00 D.
Conclusions:
- The efficacy, safety, and predictability of hyperopic LASIK retreatments are influenced by the diopter corrections in primary and retreatment procedures.
- Careful consideration of correction amounts is essential for successful hyperopic LASIK retreatment.
- These findings aid in managing patient expectations and surgical planning for hyperopic LASIK retreatment.
Related Concept Videos
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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...