Classification Based on severity, authors have classified<unk>  into clinical grades: Grade 0 - Absence of symptoms Grade 1 MILD - Symptoms but no corneal involvement Grade 2 MODERATE - Symptoms with photophobia but no corneal involvement Grade 3 SEVERE - Symptoms, photophobia, mild to moderate SPK's OR with Diffuse SPK or corneal ulcer
Vernal keratoconjunctivitis
Phlyctenular keratoconjunctivitis
Superior limbic keratoconjunctivitis
Adenoviral keratoconjunctivitis
Ocular larva migrans
Actinic conjunctivitis
Ligneous conjunctivitis
Ocular rosacea