Distribution of corneal spherical aberration in a Tanzanian population.
PLoS One
; 14(9): e0222297, 2019.
Article
em En
| MEDLINE
| ID: mdl-31513608
ABSTRACT
PURPOSE:
To investigate the distribution of corneal spherical aberration (SA) in Tanzanian people of African descent, and to examine the correlation between corneal SA and ocular parameters.DESIGN:
Cross-sectional population-based study.METHODS:
Residents aged 40 years and older in three villages in the Mkuranga district in Tanzania were enlisted as study participants. Corneal higher-order aberrations (HOAs) for the right eye were measured with a wavefront analyzer (KR-1W, Topcon) and calculated for the central 6.0-mm zone. Corneal curvature radius (CR), corneal astigmatism, and axial length (AL) were also measured and their correlation with corneal SA was assessed.RESULTS:
The right eyes of 657 participants (336 male, 321 female) were analyzed. The mean age of the subjects was 57.2 ± 10.3 years (mean ± SD). The mean corneal SA (Zernike spherical aberration coefficient C40) was 0.188 ± 0.095 µm (-0.242 to 0.613). The SAs in about three-quarters of all subjects were between 0.10 and 0.30 µm. The root mean squares of total corneal HOAs and the third- and fourth-order aberrations were 0.629 ± 0.250 µm, 0.539 ± 0.236 µm, and 0.269 ± 0.110 µm, respectively. Corneal SA showed weak significant correlations with CR (Spearman's rank correlation coefficient, r = -0.177, p < 0.001), corneal astigmatism (r = -0.142, p < 0.001), AL (r = -0.168, p < 0.001), and age (r = -0.085, p < 0.05).CONCLUSIONS:
This finding may be beneficial for selecting aspheric intraocular lens in this population.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Córnea
/
Topografia da Córnea
/
Aberrações de Frente de Onda da Córnea
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
País/Região como assunto:
Africa
Idioma:
En
Revista:
PLoS One
Ano de publicação:
2019
Tipo de documento:
Article