We found that out in children with ametropia, 20 (35.7%) had myopia, 24 (42.8%) had astigmatism and 12 (21.5%) had hypermetropia
. This is in accordance with prevalence found by studies showing that low degrees of astigmatism and anisometropia are relevant in migraine and headache.20 In another study conducted in Israel, it was found that anisometropia and myopia were the most common refractive errors encountered, followed by hyperopia and astigmatism in children with headache.21 We also found out that after correction of ametropia, 35 (62.5%) reported alleviation of headache after 4 weeks, and 42 (75%) reported alleviation in symptoms after 8 weeks.
Paired evaluations done to determine the source of the difference showed that patients in the myopia group had significantly lower total cholesterol levels compared to patients in the hypermetropia
This hyperopic change should of course be differentiated from late regression which occurs years after LASIK ablation for hypermetropia
. This might be related to the physiologic hyperopic shift that is expected to occur with time.
Additionally, in 2007, the World Health Organization attributed 18-20% of refractive errors to myopia, 5% to hypermetropia
and the rest to astigmatism (3).
Denis, "Ocular biometry in children with hypermetropia
: utility of the Lenstar LS 900 optical biometer (Haag-Streit)," Journal Francais d'Ophtalmologie, vol.
Inclusion criteria were good visual acuity (better than 20/25), low refractive error (hypermetropia
< +0.75 D; myopia and oblique or against the rule astigmatism < -0.25 D; with the rule astigmatism < -0.50 D).
In the present study prevalence of Myopia (13.62%) was more than prevalence of Hypermetropia
(11.68 %) similar to that reported by Wong T.Y et al.
5 In biology, hypermetropia
is more commonly known as long- or short-sightedness?
Therefore, a study determines their anatomical pattern so that they serve as a model for comparison with eyes that have refractive defects (myopia, hypermetropia
and stigmatism) pathological eyes (such as those that have cataracts).
Long sight Also known as hypermetropia
, this occurs when the power of the eye is too weak or the eyeball is too short.
It is the oldest and the most popular method in the world for the correction of spectacle powers (refractive errors): myopia, also called shortsightedness or nearsightedness; hypermetropia
also called or longsightedness or farsightedness and astigmatism, for those using cylindrical correction in their glasses.