Relationship between axial length of the emmetropic eye and the age, body height, and body weight of schoolchildren

ArticleinAmerican Journal of Human Biology 17(2):173-7 · March 2005with68 Reads
DOI: 10.1002/ajhb.20107 · Source: PubMed
Abstract
This report assesses the relationship of axial length of emmetropic (without refractive error) eyes to age, height, and weight in 1,600 Croatian schoolchildren. Axial eye lengths were determined by an ultrasonic eye biometry (A scan). Axial length of both eyes increases with age, height, and weight but shows a closer correlation to height and weight than to age. Boys have a significantly longer axial eye length than girls (P < 0.01). Boys or girls of similar or nearing body height and body weight and with emmetropic eyes have close linear measures of anatomic eye structures within their sex, regardless their age. Body height demonstrates the closest correlation to the growth and development of the emmetropic eye.
    • "The analysis of distribution of refractive errors has detected that emmetropia may be more prevalent than myopia and hyperopia in European populations [14] although different studies carried out in Asian populations have found that hyperopia and myopia are more prevalent than emmetropia [13, 27]. Previous studies analyzed the ocular axial length values and corneal thickness values of the emmetropic and nonemmetropic eye [19, 20, 22, 23] , but based on a bibliographic search using MEDLINE, we have found no study dedicated exclusively to the white-to-white corneal diameter and pupil diameter in healthy emmetropic eyes (i.e., those subjects with spherical equivalent refraction of ±0.5 diopters). Thus, currently, there is a lack of information on the quantitative ocular anatomy of J. A. Sanchis-Gimeno (&) Á D. Sanchez-Zuriaga Á F. Martinez-Soriano Department of Anatomy and Human Embryology, Faculty of Medicine, University of Valencia, Av. "
    [Show abstract] [Hide abstract] ABSTRACT: This report assesses white-to-white corneal diameter, pupil diameter, central corneal thickness and thinnest corneal thickness values in a large sample of emmetropic subjects. Three hundred and seventy-nine eyes of 379 young healthy emmetropic subjects were analyzed by means of scanning-slit corneal topography. The age of the subjects ranged from 18 to 53 years (mean ± SD = 29 ± 7). The mean of five consecutive measurements of the central corneal thickness, the thinnest corneal thickness, the white-to-white corneal diameter, and the photopic pupil diameter was recorded. The central corneal thickness ranged from 528 to 588 μm; the thinnest corneal thickness ranged from 504 to 574 μm; the white-to-white corneal diameter ranged from 11.5 to 12.3 mm; and the pupil diameter ranged from 3.0 to 4.7 mm. The central and the thinnest corneal thickness were positively correlated (r = 0.94, p < 0.001), and the pupil diameter was significantly higher in females (p < 0.001). This study shows that there are no differences in white-to-white corneal diameter, central corneal thickness, and thinnest corneal thickness between emmetropic females and males. However, pupil diameters are greater in emmetropic females.
    Full-text · Article · Mar 2012
  • Article · · Korean Journal of Ophthalmology
  • [Show abstract] [Hide abstract] ABSTRACT: To investigate relationships between age, weight, refractive error, and morphologic changes in children's eyes by computerized tomography (CT). Of the 772 eyes of 386 patients under the age of 20 years, who visited our Department of Ophthalmology between January 2005 to August 2006 and underwent CT of the orbit, 406 eyes of 354 patients with clear CT images and normal eyeball contour were enrolled in the present retrospective study. The axial lengths, widths, horizontal and vertical lengths, refractive errors, and body weight of eyes were measured, and relationship between these parameters were investigated. Axial length was found to correlate significantly with eye width (r=0.914), and in emmetropic eyes and myopic eyes, axial lengths and widths were found to increase as age and body weight increased. Axial lengths increased rapidly until age 10, and then increased slowly. In emmetropic eyes, widths/axial lengths increased with age, but in myopic eyes these decreased as age or severity of myopia increased. Moreover, as age increased, the myopic population and severity also increased. The axial length was longer in case of myopia compared to emmetropia in all age groups and there was almost no difference in the increase rate of axial length by the age of myopia and emmetropia. However, the width was wider in case of myopia compared to emmetropia in all age groups and the increase rate of width in myopia by age was smaller than that of emmetropia. Myopia showed decreasing rate of width/axial length with increase of age, from 1.004 in 5 years to 0.971 in 20 years. However, emmetropia showed increasing rate of width/axial length with increase of age, from 0.990 in 5 years to 1.006 in 20 years.
    Full-text · Article · Oct 2007
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