<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing some spots or clouds in my vision lately and my eyes have been extremely itchy. Can you tell me what might be causing this?  <response>: It sounds like you may have a condition called pterygium. This occurs when there is a growth of tissue on your conjunctiva, the white part of your eye, which can lead to irritation and other symptoms such as the ones you are experiencing. 