Nanophthalmos: An Update on the Biological Parameters and Fundus Abnormalities

Table 1

Comparison of three clinical phenotypes of simple microphthalmos.

Clinical phenotype	Clinical features
Nanophthalmos	Short axial length caused by shortening of the anterior and posterior segments, accompanied by thickened sclera
Relative anterior microphthalmos	Short axial length caused by shortening of the anterior segment, with a normal-sized posterior segment and without scleral thickening
Posterior microphthalmos	Short axial length caused by shortening of the posterior segment, with a normal-sized anterior segment and thickened sclera