We have a russian doc here that practice eye exams called "Osteopathy". He looks for changes of your iris and people say his diagnoses are always acurate. I did not go there myself but I belive that damages of organs can be read out of it. So, check your doctor's findings and then you will know.

probably not the eyeballs but the eyelids.

Fairly common on the eyelids, xanthomas are yellow, soft and slightly raised non-contagious bumps made of cholesterol deposits. They occur both in men (33 per cent) and women (40 per cent) who have elevated triglyercides and cholesterol levels.

Another sign of high cholesterol levels in the blood are xanthelasma - yellow patches on the eyelids, common in diabetics.