MSFinals-3807

MSFinals-3807

A 28-year-old man presents with a 5-day history of increasing pain, blurry vision and lacrimation in the left eye. He also feels a foreign body sensation in the affected eye. He has recently been swimming in an indoor swimming pool with his friends with his contact lenses on.
On examination, his visual acuity is 6/24 in the left and 6/6 in the right. The conjunctiva in the left is red. There is a white dot on the cornea, and with fluorescein, it shows an uptake in the centre of the cornea.
What is the most likely diagnosis?