Refraction is the basic test of the eyes focus problems or refractive errors. In general, there are three types of refractive errors: hyperopia, myopia and astigmatism. Hyperopia refers to the condition that the eye is shorter than normal, resulting in a focal point behind the retina which leads to blurry near vision. Myopia is an opposite condition that results from too long eyes. Nearsighted people can not see distant objects clearly. Astigmatic individuals have aspheric corneas which have different curvatures around the eye axis.
Refractive examinations are offered by optometrists, ophthalmologists and opticians. However, ophthalmologists usually charge more because they are more skilled and knowledgeable. Moreover, an ophthalmologist also has the ability to examine the patients inside of the eye, as well as take pressure readings.
Contact lenses require additional tests of eye curvature than spectacles. This is quite necessary for the contacts wearers to get comfortable and clear vision. Only properly fitted lenses with precise curvatures can do this. In addition, rigid contacts are harder to fit than soft lenses.
Price of spectacles has been greatly brought down due to technological advances, faster transportation as well as other factors. Mass production is still lowering the price of both eyeglass frames and lenses. Currently, most eyeglasses are dispensed through local stores or dispensing opticians or ophthalmologists. Through these channels, wait time can be significant and prices are usually higher. Online discount
eyeglasses can bring more savings to customers. However, they still need to get their spectacles adjusted by local stores.
As the federal law Fairness To Contact Lens Customers went into effect in 2004, prices of contact lenses are much lower than before. According to this law, eye care practitioners could not reject a patients requirement for his prescription. With a valid prescription, customers can then purchase contacts via email or internet. It is commonly reported that online contacts stores always offer great discounts, compared to local dispensers.
