Does Hofstetter's equation predict the real amplitude of accommodation in children?

Clinical & Experimental Optometry : Journal of the Australian Optometrical Association
Hassan HashemiAkbar Fotouhi

Abstract

The aim was to determine the distribution and associated factors of accommodative amplitude (AA) in six- to 12-year-old children and compare the results with those calculated using Hofstetter's formula. In a cross-sectional study in 2015, random sampling was done from urban and rural populations of Shahroud, northern Iran. Participating schoolchildren were examined for manifest, cycloplegic and subjective refraction, as well as uncorrected vision and visual acuity. The AA was measured with Donders' push-up method using a ruler. The near point of convergence (NPC) was also measured. Of the 6,624 selected children, 5,620 participated in the study and after applying the exclusion criteria, the final analyses were done on data from 5,444 schoolchildren. The mean age of the final sample was 9.24 ± 1.71 years (from six to 12 years) and 53.6 per cent (n = 2,919) were boys. Mean measured AA was 14.44 D (95 per cent confidence interval [CI]: 14.33-14.55). In all age groups, the mean measured AA was less than the predicted mean value calculated with the Hofstetter's equation. Mean measured AA was 14.44 D (95 per cent CI: 14.28-14.59) and 14.45 D (95 per cent CI: 14.29-14.6) in boys and girls, respectively (p = 0.926). AA significantly de...Continue Reading

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Citations

Dec 12, 2018·International Journal of Epidemiology·Mohammad Hassan EmamianAkbar Fotouhi
Sep 29, 2020·Clinical Optometry·Jameel Rizwana Hussaindeen, Amirthaa Murali
Oct 30, 2020·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Angela M ChenUNKNOWN Convergence Insufficiency Treatment Trial - Attention and Reading Trial (CITT-ART) Investigator Group
Jun 26, 2021·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Mohaddeseh GhobadiMehdi Khabazkhoob
Aug 7, 2021·Evidence-based Complementary and Alternative Medicine : ECAM·Chi-Ting HorngPo-Chuen Shieh

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