Bilateral ptosis is not seen in
A i.e. Marfan's Syndrome Marfan's Syndrome does not present with ptosis. It has bilateral subluxation of lens, retinal detachment, hypoplasia of dilator pupilae, flat cornea, axial myopia & angle anomaly etc.
Marfan's syndrome
Myaesthenia gravis
Myotonic dystrophy
Kearns sayre syndrome