Eyeglass Concepts

Traditional / Standard Technology

Are the production technology which the front surface is processed progresively by the manufacturer and the back surface is processed with the simple curves by the Rx Labs.

FreeForm Technology

It is a new manufacturing technology used for the production of eyeglass lenses. With this technology, the progressive surface which is previously handled on the front surface by the manufacturer, is then processed on the back surface using a very sensitive CNC machines by Rx labs. Software is of great importance.

Refractive Index

Refractive index, is a measure of the material used in the lens that how easy can break the light. The higher this value is, the less the material meets the same degree of spectacle lenses can be obtained. Therefore, in the high refractive index lenses , for the thickness is got thinned, generally it is considered as a measure of thinning in our country.

Abbe Value

Refers to the value of the deviation of the ray on the material. The higher the degree that is the deviation, the more transparent appears the material.

Density

Is the feature about the weight of the lens. Intensity value increases, the weight of the glass increases at the same ratio. When used optical lenses, the lenses minimized in terms of density should be preferred.

UV Cutoff

The material used for harmful ultraviolet rays (UVA, UVB and UV400, etc.) from which the wavelength have been blocked. The higher is the value the higher the blocking ratio is. UV-A and UV-B can damage our eyes more which is the most sensitive organ of our body. Particularly it causes cataract and retinal damage.

Ultraviolet (UV) Rays

Briefly, the UV are the electromagnetic radiations between 10 and 400 nm, that are between the rays we have seen and the X-rays. The human eye is sensitive to the rays between 400 and 700 nm wavelengths. Because we can see the smallest wavelengthed ray in purple, it is called "ultraviolet radiation". Nm is the one billionth of a meter. 6% of the rays of sunlight includes radiotional UV rays. It is divided into into three wavelength named as long (UV-A), moderate (UV-B) and short (UV-C).

UV-A

It is the UV beam which has the longest wavelenght and reaches the nearest to the Earth. It provides a temporary tan by darkening the melanin acumulated in our skin. Its longitudinal wavelenght is between 315-400 nanometers and is very harmful for the eyes.

UV-B

It is the UV beam which has the middle wavelenght. It is in between 280 and 315 nm Wavelenght. UV-B is the ray affecting the synthesis of the pigment melanin in the skin and accumulates late, but has the long-term tan. It may lead to aggravated redness, edema, pain, and sunburn.

UV-C

Is the ultraviolet ray which has the destructive sterilization effect on microorganisms and has short wavelength (200-280 nm). Especially affects the eyes. Blocks the ozone layer in the atmosphere from reaching the earth.Today, in the regions which the ozone layer get thinned, the priority must be to protect our eyes from this ray.

UV-400

The wavelength of rays emitted from the sun is between 400-800 nm. Especially, in mountainous regions it enhances its effect.