I think when you have complained yellowish, some body suggested, it may be jaundice and suggested these tests. They are normal. Eye shows mild discolouration, normal in persons exposed to dust and sunlight. It is not a disease. If you get yourself exposed to sunlight, this may turn into pingecula and later pteryzium. At present you need not do anything. Wear a hat, or use umbrella 🌂 to reduce exposure to sunlight and colored glasses 👓 to reduce exposure to light.