Kusumlata presents with acute painful red eye and mild dilated veically oval pupil. Most likely diagnosis is:
Acute painful red eye and mild dilated veically oval pupil give the diagnosis of acute angle closure glaucoma. Ref: Comprehensive Ophthalmology By AK Khurana, 2nd Edition, Page 232
Acute retrobulber neuritis
Acute angle closure glaucoma
Acute anterior uveitis
Severe keratoconjunctivitis