Related Experiment Video
Updated: Feb 10, 2026

05:46
Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
Published on: September 20, 2024
825
Corneal Stability following Hyperopic LASIK with Advanced Laser Ablation Profiles Analyzed by a Light Propagation
Almutez M Gharaibeh1,2, Asier Villanueva3, David Mas3
1Department of Ophthalmology, The University of Jordan Faculty of Medicine, Amman, Jordan.
Journal of Ophthalmology
|May 23, 2018
Summary
Modern hyperopic LASIK using advanced excimer laser technology demonstrates excellent anterior corneal surface stability. Light propagation analysis confirms predictable outcomes 12 months post-surgery.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Biomechanics
Background:
- Hyperopic LASIK aims to correct farsightedness.
- Assessing long-term corneal stability is crucial for refractive surgery outcomes.
- Advanced excimer laser platforms offer improved precision in corneal reshaping.
Purpose of the Study:
- To evaluate the anterior corneal surface stability 12 months after hyperopic LASIK.
- To analyze refractive and visual outcomes following hyperopic LASIK.
- To assess the efficacy of a light propagation algorithm in monitoring corneal changes.
Main Methods:
- Retrospective analysis of 37 eyes undergoing hyperopic LASIK with a 6th-generation excimer laser.
- Corneal topography analyzed using a light propagation algorithm over 12 months.
- Evaluation of objective corneal power, subjective refractive error, and visual acuity.
Main Results:
- Minimal objective corneal power regression observed (0.39-0.41 D).
- High percentage of eyes achieved desired visual outcomes (65% within ±0.50 D SE, 70% UDVA ≥20/20).
- Corneal stability confirmed with 0.14 D regression and no significant changes over time.
Conclusions:
- Modern hyperopic LASIK with 6th-generation excimer laser technology provides stable corneal surfaces.
- Light propagation analysis is a reliable method for assessing corneal stability post-LASIK.
- The procedure yields predictable and stable refractive and visual results over 12 months.
More Related Videos
Related Concept Videos
Nuclear Stability
23.4K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
To hold positively charged protons together...
23.4K
RNA Stability
35.8K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.8K
The Wave Nature of Light
61.6K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.6K
Propagation of Waves
3.0K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
3.0K
Propagation of Action Potentials
9.6K
The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
9.6K
Stability
423
The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
423

