Brief Answer:
Need Clinical examination, fundus examination, VEP, MRI

Detailed Answer:
Hi,

Welcome to HealthCareMagic.com I am Dr.J XXXXXXX Anto Bruno Mascarenhas, and I am here to help you. I have read your question with care and understand your concerns.  

The camera Flash in your left eye can be due to various reasons
the most common ones are
1. Infections of eye
2. Increased pressure inside eye
3. Increased pressure inside skull
4. Infection or Inflammation of optic pathway
5. Reduced Blood Flow

To narrow down the diagnosis
you need to have
1. Clinical Examination
2. Fundus examination
3. Slit lamp examination
4. VEP
5. MRI Brain and Orbit
6. Cardiac evaluation

I would request you to consult your Neurosurgeon at the earliest

Hope you found the answer helpful.

If you need any clarification / have doubts / have additional questions / have follow up questions, then please do not hesitate in asking again. I will be happy to answer your questions.

Best Wishes for Speedy Recovery
Let me know if I can assist you further.
Take care.

-oOo-

PS 1 : After all your doubts have been cleared, kindly (a) Close this Question (b) Rate my Replies and (c) Give your Feedback.

PS 2 : In the future, for continuity of care, I encourage you to contact me directly in HealthCareMagic at http://bit.ly/askdrbruno

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