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.
Puffy eyes can also be caused by lack of sleep or excessive alcohol intake. Additional causes of puffy eyes include: Normal aging process; Skin disorders such as dermatitis; Diet; Hypothyroidism; Dysfunction of tear glands; Nephritic syndrome; puffy eyes may be the first sign of this condition; Contact lenses; Allergies; Conjunctivitis; Blepharitis; Styes; Eye infections