Answer: Refraction Phoropter
Explanation:
Refraction (refractive power): As light enters the eye, the lens helps focus light rays so that they come to a focus on the retina. This action is called refraction.
An instrument called a phoropter detects the eye’s error of refraction.
Eating a diet with plenty of fruits and vegetables has been linked to improved health.
Veggies and fruits (both fresh and frozen) are loaded with different type of vitamins, minerals and fibers which have been shown to protect against chronic diseases such as heart disease and cancer.
Also as they are low in calories they help you in reducing weight too. You can eat a large portion and not have to worry about weight gain.