Type : Phenotype or locus, molecular basis unknown;
Description : Myopia, or nearsightedness, is a refractive error of the eye. Light rays from a distant
object are focused in front of the retina and those from a near object are focused
in the retina; therefore distant objects are blurry and near objects are clear (summary
by Kaiser et al., 2004). - Genetic Heterogeneity of Susceptibility to Myopia MYP2
maps to chromosome 18p. Other myopia loci include MYP1 (310460) on Xq28; MYP3 (603221)
on 12q; MYP5 (608474) on 17q; MYP6 (608908) on 22q12; MYP7 (609256) on 11p13; MYP8
(609257) on 3q26; MYP9 (609258) on 4q12; MYP10 (609259) on 8p23; MYP11 (609994) on
4q22-q27; MYP12 (609995) on 2q37.1; MYP13 (300613) on Xq23-q25; MYP14 (610320) on
1p36; MYP15 (612717) on 10q21.1; MYP16 (612554) on 5p15.33-p15.2; MYP17 (formerly
MYP4) (608367) on 7p15; MYP18 (255500) on chromosome 14q21-q24; MYP19 (613969) on
5p15.1-p13.3; MYP20 (614166) on 13q12.12; MYP21 (614167), caused by mutation in the
ZNF644 gene (614159) on 1p22.2; MYP22 (615420), caused by mutation in the CCDC111
gene (615421) on 4q35; and MYP23 (615431), caused by mutation in the LRPAP1 gene (104225)
on 4p16.;