Thank you for your question. Based on your photograph it appears that your snake may have built up eye caps that failed to come off during previous sheds, but you should take your snake to a reptile vet to have it examined. If you aren't experienced in removing these you can easily damage the snake's eye. Also, this may be some other type of condition. A reptile vet will be able to accurately assess the problem and recommend treatment.
I hope this information helps, and thank you for contacting Ask an Expert.