Limits...
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.

Show MeSH

Related in: MedlinePlus

Postoperative change of HOAs. (A) Coma, (B) Spherical aberration, (C) Total HOA.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC2629903&req=5

Figure 3: Postoperative change of HOAs. (A) Coma, (B) Spherical aberration, (C) Total HOA.

Mentions: Drawing graphs pertaining to the changes of HOAs before and after surgery, the anterior corneal aberration and ocular aberration were observed to increase equally, while the internal optics aberration maintained at a low level (Fig. 3). In the case of spherical aberration, a high value of anterior corneal aberration (0.648 µm) was compensated by the negative value of the internal optics aberration (-0.496 µm), allowing the ocular aberration (0.152 µm) to remain at a low level (Fig. 3). Similar patterns were found for coma and total HOA. Calculating increasing rates of aberrations before and 3 months after surgery, coma, spherical aberration and total HOA increased 1.7-, 2.6-, and 1.8-fold from previous values in anterior corneal aberrations, respectively. In ocular aberrations, coma, spherical aberration, and total HOA increased by 1.5, 1.4, and 1.5 times that of previous values, respectively (Table 1). Regarding internal optics aberrations, there were no statistically significant differences before and after surgery in coma, spherical aberration, and total HOA (all p>0.05).


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

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

Postoperative change of HOAs. (A) Coma, (B) Spherical aberration, (C) Total HOA.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: Postoperative change of HOAs. (A) Coma, (B) Spherical aberration, (C) Total HOA.
Mentions: Drawing graphs pertaining to the changes of HOAs before and after surgery, the anterior corneal aberration and ocular aberration were observed to increase equally, while the internal optics aberration maintained at a low level (Fig. 3). In the case of spherical aberration, a high value of anterior corneal aberration (0.648 µm) was compensated by the negative value of the internal optics aberration (-0.496 µm), allowing the ocular aberration (0.152 µm) to remain at a low level (Fig. 3). Similar patterns were found for coma and total HOA. Calculating increasing rates of aberrations before and 3 months after surgery, coma, spherical aberration and total HOA increased 1.7-, 2.6-, and 1.8-fold from previous values in anterior corneal aberrations, respectively. In ocular aberrations, coma, spherical aberration, and total HOA increased by 1.5, 1.4, and 1.5 times that of previous values, respectively (Table 1). Regarding internal optics aberrations, there were no statistically significant differences before and after surgery in coma, spherical aberration, and total HOA (all p>0.05).

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