Installing a central air conditioner costs on average $2650, although it can cost as much as $15,000. This installation cannot be considered a DIY project, and it is traditional for a homeowner to hire a contractor for the job. Cost breakdown.
If the light blue iris ring you are seeing is at or near the margin between the iris (colored part of your eye) and the sclera (white part) and forms a large ring around that margin it is likely to be a deposit of cholesterol. It does not damaging to the eye and does not interfere with vision.
There are four main causes of pink eye: Viruses; Bacteria; Allergens (like pet dander or dust mites) Irritants (like smog or swimming pool chlorine) that infect or irritate the eye and eyelid lining; It can be difficult to determine the exact cause of pink eye because some signs and symptoms may be the same no matter the cause.