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.
A Dr. Josh Johnston, OD, Optometry, answered. Black spots in your vision are usually due to a benign condition often referred to as floaters. The inside of your eye is a made of a gelatinous water material called the vitreous. Normal debris or objects are present in the vitreous. When light hits these particles in the vitreous, a shadow is cast on the retina causing black spots or floaters to be seen.