According to the report, the cost of installing sprinkler systems to the home builder averaged $1.61 per sprinklered square foot. The cost of sprinkler systems to the home builder, in dollars per sprinklered square foot, rangedfrom $0.38 to $3.66.
A refraction test is usually given as part of a routine eye examination. It may also be called a vision test. This test tells your eye doctor exactly what prescription you need in your glasses or contact lenses.Normally, a value of 20/20 is considered to be optimum, or perfect vision.our doctor may also do this test without the help of a machine. In this case, he or she shines a light into each of your eyes and looks at the amount of light that is bouncing off your retina to measure your refractive score. Afterwards, your doctor will need to determine exactly what prescription you need.
This test can be done as part of a routine eye exam. The purpose is to determine whether you have a refractive error (a need for glasses or contact lenses). For people over age 40 who have normal distance vision but difficulty with near vision, a refraction test can determine the right power of reading glasses.ou have a refractive error if you need a combination of lenses to see 20/20. Glasses or contact lenses should give you good vision. If you have a refractive error, you have a prescription.. Your prescription is a series of numbers that describe the powers of the lenses needed to make you see clearly.