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Comparison between anterior corneal aberration and ocular aberration in laser refractive surgery.

Lee JM, Lee DJ, Jung WJ, Park WC - Korean J Ophthalmol (2008)

Bottom Line: Anterior corneal aberration and ocular aberration were measured by Pentacam and an aberrometer (LADARWave) respectively.There were no statistically significant differences of internal optics aberration values (ocular aberration minus anterior corneal aberration) in coma, spherical aberration, and total HOA.As a result, anterior corneal aberration and ocular aberration increased equally.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, College of Medicine, Dong-A University, Pusan, Korea.

ABSTRACT

Purpose: To compare changes of anterior corneal aberration (Pentacam) and ocular aberration (aberrometer, LADARWave) after laser refractive surgery.

Methods: Sixty-six eyes underwent laser refractive surgery and were retrospectively reviewed. Anterior corneal aberration and ocular aberration were measured by Pentacam and an aberrometer (LADARWave) respectively. Changes of root mean square (RMS) values of coma, spherical aberration, and total high order aberration (HOA) were evaluated before, 1 month, and 3 months after surgery

Results: Ocular aberrations displayed low preoperative values, but after laser refractive surgery, anterior corneal aberration and ocular aberration increased equally. There were no statistically significant differences of internal optics aberration values (ocular aberration minus anterior corneal aberration) in coma, spherical aberration, and total HOA. Anterior corneal aberration and ocular aberration showed statistically significant correlations at 1 and 3 months after surgery.

Conclusions: Internal optics aberration compensated the anterior corneal aberration effectively before surgery, but the increase of anterior corneal aberration after laser refractive surgery exceeded the compensation of internal optics. As a result, anterior corneal aberration and ocular aberration increased equally. The correlation between anterior corneal aberration and ocular aberration after surgery was statistically significant due to the increased proportion of anterior corneal aberration in ocular aberration.

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Schematic diagram of composition of aberration. Complete ocular (eye) aberration is composed of the anterior corneal aberration (red color) and internal optics aberration (blue color).
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Figure 1: Schematic diagram of composition of aberration. Complete ocular (eye) aberration is composed of the anterior corneal aberration (red color) and internal optics aberration (blue color).

Mentions: Ocular aberration consists of anterior corneal aberration and internal optics aberration (Fig. 1). Internal optics includes the posterior corneal surface as well as the lens and vitreous body. In normal eyes, high values of anterior corneal aberration are compensated by negative values of internal optics aberration and as a result, ocular aberration values decrease.9,10 When laser refractive surgery is performed, aberrations are increased by deforming the anterior corneal surface.


Comparison between anterior corneal aberration and ocular aberration in laser refractive surgery.

Lee JM, Lee DJ, Jung WJ, Park WC - Korean J Ophthalmol (2008)

Schematic diagram of composition of aberration. Complete ocular (eye) aberration is composed of the anterior corneal aberration (red color) and internal optics aberration (blue color).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2629903&req=5

Figure 1: Schematic diagram of composition of aberration. Complete ocular (eye) aberration is composed of the anterior corneal aberration (red color) and internal optics aberration (blue color).
Mentions: Ocular aberration consists of anterior corneal aberration and internal optics aberration (Fig. 1). Internal optics includes the posterior corneal surface as well as the lens and vitreous body. In normal eyes, high values of anterior corneal aberration are compensated by negative values of internal optics aberration and as a result, ocular aberration values decrease.9,10 When laser refractive surgery is performed, aberrations are increased by deforming the anterior corneal surface.

Bottom Line: Anterior corneal aberration and ocular aberration were measured by Pentacam and an aberrometer (LADARWave) respectively.There were no statistically significant differences of internal optics aberration values (ocular aberration minus anterior corneal aberration) in coma, spherical aberration, and total HOA.As a result, anterior corneal aberration and ocular aberration increased equally.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, College of Medicine, Dong-A University, Pusan, Korea.

ABSTRACT

Purpose: To compare changes of anterior corneal aberration (Pentacam) and ocular aberration (aberrometer, LADARWave) after laser refractive surgery.

Methods: Sixty-six eyes underwent laser refractive surgery and were retrospectively reviewed. Anterior corneal aberration and ocular aberration were measured by Pentacam and an aberrometer (LADARWave) respectively. Changes of root mean square (RMS) values of coma, spherical aberration, and total high order aberration (HOA) were evaluated before, 1 month, and 3 months after surgery

Results: Ocular aberrations displayed low preoperative values, but after laser refractive surgery, anterior corneal aberration and ocular aberration increased equally. There were no statistically significant differences of internal optics aberration values (ocular aberration minus anterior corneal aberration) in coma, spherical aberration, and total HOA. Anterior corneal aberration and ocular aberration showed statistically significant correlations at 1 and 3 months after surgery.

Conclusions: Internal optics aberration compensated the anterior corneal aberration effectively before surgery, but the increase of anterior corneal aberration after laser refractive surgery exceeded the compensation of internal optics. As a result, anterior corneal aberration and ocular aberration increased equally. The correlation between anterior corneal aberration and ocular aberration after surgery was statistically significant due to the increased proportion of anterior corneal aberration in ocular aberration.

Show MeSH
Related in: MedlinePlus