Typically bilatyeral inferior subluxations of the lens is seen in -
In Homocystinuria there is inferomedial (inferonasal) dislocation of lens. (Ref: Khurana 7th/e p.222 & 4th/e p.202)
Marfan's syndrome
Homocystinuria
Hyperinsulinemia
Ocular trauma
Lens