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Role of corneal radius of curvature in early identification of fundus tessellation in children with low myopia
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  • Published on: 21 September 2023
    The role of keratometry in myopia control practice.
    • Rafael Iribarren, Ophthalmology and Research in Myopia Drs. Iribarren Eye Consultants, Buenos Aires, Argentina.

    It is generally believed that retinal neurons stop growing in number after birth in humans.1, 2 But recent research has shown retinal neurogenesis in neonatal 1-3 month old monkeys.3 This poses the question of how the sclera and the retina grow during emmetropization. The ora serrata is reported to be 2 mm wide growing to 6-7mm (approximately 5mm difference) in adult life as the scleral tunic grows more than the retina.4 The vitreous chamber depth in newborns is 10.6mm long and also grows roughly by 6 mm to an adult axial value of 17mm on average.5 It is then possible that during the first 3 months of human life, at that rapid growth phase from 17mm to 19mm in mean axial length,6 the retina could grow at least 1mm to compensate in part for that rapid elongation. The eyes of males and females have only a 0.1mm difference at birth with very small differences in body length and head circumference, but bigger born babies have longer eyes with less powerful corneas,7 so a bigger born girl may have a bigger eye with flatter cornea than a smaller born male. When adulthood is reached, women have eyes shorter than those of men by 0.7mm, with steeper corneas and more powerful crystalline lenses.8 As the cornea stabilizes by ages 2-3 in infants, these differential growth patterns are probably established early in life.4 And as usually happens not only among males and females, emmetropic or low hyperopic eyes that develop low corneal powers are longer than eyes that stay with steep co...

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    Conflict of Interest:
    None declared.