Hi, Welcome to icliniq.com. This is called subconjunctival hemorrhage. It happens when a blood vessel bursts and gives some blood out, under the superficial layer of the eye called conjunctiva. It happens because of high pressure in the vessel like high blood pressure or coughing or constipation or holding heavy objects. The treatment usually is only by lubricant eye drops if it happens for the first time.
Hello, Welcome to icliniq.com. Unfortunately, his eyesight will not return to normal. But his vision can be corrected with a LASIK surgery after he turns 18. It is not a serious condition. It cannot be improved with diet.
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