To optometry glasses based

The so-called refraction, is through the main sleep or check out the eyes he felt accurate refraction, as with Ray Ban Outlet Sunglasses basis.

Optometry in two ways: one is the main optometry, optometry without dilated pupil, but according to the patient to determine the quality of subjective vision refraction, glasses and more generally in this way, which is characterized by relatively simple, speed, can carry a lot. This method is suitable for people over the age of 40, but for children under the age of 12, farsightedness, astigmatism, and other projects likely to have pseudo myopia error optometry shall adopt the second method, which dilated optometry.

Cyclopedia refraction is optometry with mid rise migrate will completely disappear into the light reflex, and then optometry. Cyclopedia refraction has the following advantages:

1 Since spasm caused pseudo myopia, once dilated, regulation disappeared, pseudo myopia also recovered;

2 young eyes, a strong regulatory role, if not dilated, optometry degree of error great;

3 have astigmatism eyes, dilated optometry degree and position of the axis of astigmatism can check more accurately;

4 hypertrophy regulatory roles are also very strong, and preferably also dilated optometry. As a result of cyclopedia refraction objective of myopically, patients with mental retardation can be accurately Tao out of its degrees.

Students myopia vision correction, optometry requires not only the right, making glasses qualified, and must properly wear glasses. Otherwise it can still cause undue visual impairment.

1. Unclean. Ray Ban Wayfarer Glasses supposed to clean the lens clear; some students this is quite neglected, lenses get dirty. Some glasses have been used for many years; numerous scratches lenses affect light through.

2, the frame twisted. Due to prolonged wear, it is inevitable to make glasses squeezed, stretch, frame distortion. Optical center of the lens when wo on the pupil can not be positive, resulting prism effect, damage eyesight.

3. Far and near universal. Because mild myopia (-3.00D less) glasses, should as far when (egg see the blackboard) wear. Near vision (such as homework) that should be removed. Otherwise it will increase the burden of regulation of culinary muscle, and promote the development of myopia.

4. by wearing Cheap Ray Ban Sunglasses. Some students suffering from myopia, you do not go optometry, but by someone else (such as siblings, classmates) wear glasses.