Limits...
Comparison of higher order aberrations in patients with various refractive errors.

Khan MS, Humayun S, Fawad A, Ishaq M, Arzoo S, Mashhadi F - Pak J Med Sci (2015 Jul-Aug)

Bottom Line: Included were the patients who had refractive error more than ± 0.5D and best corrected visual acuity (BCVA) of 0.00 or better.Seventy one (35.5%) were males and 129 (64.5%) were female.Mean RMS value of HOAs, coma and spherical aberrations was calculated in all four groups.

View Article: PubMed Central - PubMed

Affiliation: Dr. Muhammad Saim Khan, Armed Forces Institute of Ophthalmology, Rawalpindi, Pakistan.

ABSTRACT

Objective: To compare the mean root mean square (RMS) of total higher order aberrations (HOAs), coma and spherical aberrations in individuals with myopia, hypermetropia and myopic astigmatism.

Methods: This prospective analytical study was conducted at Armed Forces Institute of Ophthalmology, Rawalpindi, Pakistan from Jan 2014 to Dec 2014. Two hundred eyes of 121 patients with age ranging from 18-40 years were included in the study. Patients were divided into 4 group namely Low myopia, High myopia, Astigmatism and Hypermetropia on the basis of refractive error. Included were the patients who had refractive error more than ± 0.5D and best corrected visual acuity (BCVA) of 0.00 or better. Patients who had history of surgery and / or eye disease were excluded from the study. Visual acuity (VA), Spherical equivalent (SE) of refractive error, RMS value of total HOAs, coma and spherical aberrations were evaluated. HOAs were measured with aberrometer (Wavelight analyzer version 1073) at 6 mm pupil size.

Results: Age of the patients ranged from 18 years to 40 years with mean age of 29.10±10.6 years. Seventy one (35.5%) were males and 129 (64.5%) were female. Mean RMS value of HOAs, coma and spherical aberrations was calculated in all four groups. RMS of total HOAs and spherical aberrations in hypermetropia was 0.96±0.96 and 0.30±0.42 respectively and it was higher than other three groups.

Conclusions: In overall comparison the mean RMS of total HOAs and spherical aberrations was significantly increased in hypermetropia group and there was a statistically significant negative correlation of SE of hypermetropia with RMS of total HOAs and spherical aberration.

No MeSH data available.


Related in: MedlinePlus

Total HOA and SE.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4590385&req=5

Figure 1: Total HOA and SE.

Mentions: A total of 200 eyes of 121 patients were studied. Seventy one (35.5%) were males and one hundred and twenty nine (64.5%) were females. Age of the subjects ranged from 20 to 40 years with mean age of 29.1±10.6 years. Mean age of hypermetropes was 32.3±8.33 while other three groups were 23.5±3.5, 24.5±3.0, 23.5±3.0 for low myopia, high myopia and astigmatism respectively. Refractive error was described in terms of spherical equivalent and it ranged from +6.00 to - 10.50 D. RMS of total HAOs, spherical aberrations and coma were calculated and given in Table-II. The distribution of various HOAs across the range of refractive error is given in scatter graphs. (Fig. 1, 2 & 3). Correlation of SE of refractive error and various HOAs was analyzed and statistically significant is marked as * in Table-III.


Comparison of higher order aberrations in patients with various refractive errors.

Khan MS, Humayun S, Fawad A, Ishaq M, Arzoo S, Mashhadi F - Pak J Med Sci (2015 Jul-Aug)

Total HOA and SE.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4590385&req=5

Figure 1: Total HOA and SE.
Mentions: A total of 200 eyes of 121 patients were studied. Seventy one (35.5%) were males and one hundred and twenty nine (64.5%) were females. Age of the subjects ranged from 20 to 40 years with mean age of 29.1±10.6 years. Mean age of hypermetropes was 32.3±8.33 while other three groups were 23.5±3.5, 24.5±3.0, 23.5±3.0 for low myopia, high myopia and astigmatism respectively. Refractive error was described in terms of spherical equivalent and it ranged from +6.00 to - 10.50 D. RMS of total HAOs, spherical aberrations and coma were calculated and given in Table-II. The distribution of various HOAs across the range of refractive error is given in scatter graphs. (Fig. 1, 2 & 3). Correlation of SE of refractive error and various HOAs was analyzed and statistically significant is marked as * in Table-III.

Bottom Line: Included were the patients who had refractive error more than ± 0.5D and best corrected visual acuity (BCVA) of 0.00 or better.Seventy one (35.5%) were males and 129 (64.5%) were female.Mean RMS value of HOAs, coma and spherical aberrations was calculated in all four groups.

View Article: PubMed Central - PubMed

Affiliation: Dr. Muhammad Saim Khan, Armed Forces Institute of Ophthalmology, Rawalpindi, Pakistan.

ABSTRACT

Objective: To compare the mean root mean square (RMS) of total higher order aberrations (HOAs), coma and spherical aberrations in individuals with myopia, hypermetropia and myopic astigmatism.

Methods: This prospective analytical study was conducted at Armed Forces Institute of Ophthalmology, Rawalpindi, Pakistan from Jan 2014 to Dec 2014. Two hundred eyes of 121 patients with age ranging from 18-40 years were included in the study. Patients were divided into 4 group namely Low myopia, High myopia, Astigmatism and Hypermetropia on the basis of refractive error. Included were the patients who had refractive error more than ± 0.5D and best corrected visual acuity (BCVA) of 0.00 or better. Patients who had history of surgery and / or eye disease were excluded from the study. Visual acuity (VA), Spherical equivalent (SE) of refractive error, RMS value of total HOAs, coma and spherical aberrations were evaluated. HOAs were measured with aberrometer (Wavelight analyzer version 1073) at 6 mm pupil size.

Results: Age of the patients ranged from 18 years to 40 years with mean age of 29.10±10.6 years. Seventy one (35.5%) were males and 129 (64.5%) were female. Mean RMS value of HOAs, coma and spherical aberrations was calculated in all four groups. RMS of total HOAs and spherical aberrations in hypermetropia was 0.96±0.96 and 0.30±0.42 respectively and it was higher than other three groups.

Conclusions: In overall comparison the mean RMS of total HOAs and spherical aberrations was significantly increased in hypermetropia group and there was a statistically significant negative correlation of SE of hypermetropia with RMS of total HOAs and spherical aberration.

No MeSH data available.


Related in: MedlinePlus