Purchase this article with an account.
Hiroki Tanaka, Takako Tachikawa, Ritsuko Ueno, Yoshinobu Mizuno, Toru Noda, Osamu Katsumi; Correlation Between The Spherical Equivalent And Axial Length, Corneal Radius, Lens Thickness, And Anterior Chamber Depth In Premature Infants During The First Year Of Life. Invest. Ophthalmol. Vis. Sci. 2011;52(14):3140.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To investigate the factors primarily correlated with the spherical equivalent (SE) in premature children during the first year of life.
One hundred twenty eyes of 69 premature children were studied; 68 eyes of 38 premature children were studied at 4 months of corrected age, 52 eyes of 31 premature children were studied at 12 months of corrected age. The overall mean gestational age was 26.9±2.65 weeks (range, 22-34). The mean birth weight was 943.7±348.8 gm (range, 474-1,922). The patients were divided into two primary groups by age and subdivided by treatment: group 1, 41 eyes of 25 patients, gestational age at birth ≥22 weeks and ≤25 weeks; group 1A, 21 untreated eyes; group 1B, 20 laser-treated eyes; and group 2, 79 eyes of 44 patients, gestational age at birth ≥26 weeks and ≤34 weeks; group 2A, 46 untreated eyes; group 2B, 33 laser-treated eyes. The spherical equivalent (SE), anterior chamber depth (ACD), axial length (AL), corneal radius (CR), and lens thickness (LT) were measured in all infants using ultrasound A-scan biometry and keratometry.
The average values at 4 months of corrected age were SE, 1.49±1.60 diopters; AL, 18.66±0.54 mm; CR, 7.36±0.31 mm; LT, 3.96±0.15 mm; and ACD, 2.67±0.32 mm. The SE was correlated with the CR (P=0.0028, r=0.36). The AL, LT, ACD were not correlated with the SE. The average values at 12 months of corrected age were SE, -0.17±1.43D; AL, 19.87±0.91 mm; CR, 7.47±0.39 mm; LT, 3.94±0.18 mm; and ACD, 2.98±0.09 mm. The SE was correlated with AL (P=0.041, r=-0.28). The CR, LT, ACD were not correlated with the SE. The LT was correlated with the SE in group 1B (4 months, r=-0.62; 12 months, r=-0.43). The LT was not correlated with the SE in groups 1A, 2A, or 2B at 4 and 12 months. The ACD was not correlated with the SE in any group at 4 and 12 months (P>0.3) (all comparisons by Spearman’s correlation coefficient by rank test).
In premature infants, the factor primarily correlated with the SE was the CR at 4 month and the AL at 12 month. The ACD was not correlated with the SE during the first year of life. The LT was correlated with the SE in laser-treated and gestational age at birth ≤25 weeks.
This PDF is available to Subscribers Only