Medicinal Filters and its Applications

Medicinal Filters and its Applications

Article written by Paulus Maciel. Rights reserved. This material aims to clarify the definition of lens filter and its application in medical wellness user.

We know that light is part of a sequence of electromagnetic waves. Also part of this "spreading" other ingredients, such as ultraviolet and infrared, all in their respective wavelengths. To explain simply, "wavelength" is the method used to observe and measure the position of these components in sequence propagation of electromagnetic waves. In that study the optical ultra viloleta is between 100 and 400 nanometers * (nanometer is a measurement scale that corresponds to one millionth of a millimeter), the visible spectrum (light) is between 400 and 700 nanometers. From the 700 namômetros is infrared. See the image below all the dynamics of wave propagation. (Click on image to enlarge it if necessary).

Along the visible spectrum, are positioned colors:

1. Violet 380-450 nanometers.
2. Anil 420-440 nanometers.
3. Blue 440-490 nanometers.
4. Green 520-570 nanometers.
5. Yellow 570-590 nanometers.
6. Orange 590-620 nanometers.
7. Red 620-740 nm.

 Through clinical diagnoses, we can see that some people are more sensitive to certain bands of the spectrum, causing discomfort and loss of visual contrast. Filters medicinal stains are very high precision, preventing the arrival of certain parts of the spectrum to the eye, thereby improving comfort and visual contrast of the individual. filters There are several medicinal available, each with its specific function of preventing the passage of a certain portion of the spectrum. I quote below the main filters and functions **:

• F60, F80 and F90 are filters for diabetic retinopathy. Alleviate glare, allowing better comfort through low absorption portion of the spectrum.
• F540, F560 and F580 filters are ideal for monochrome, low vision, nistagma and poor discrimination of colors.
• F451 and F452 filters are ideal for achromatopsia, generally characterized by a failure of retinal cells that perceive color (cones) in addition to hypersensitive cell perceptoras brightness (rods).

The choice of color and tone of the specific filter to the need is made ​​by visual subjective analysis, where the user experiences the filters over a period ranging from 10 to 30 minutes, which itself will choose ideal color and shade between the samples pre-selected ophthalmologist. retina specialists have all samples with shades and colors for detailed evaluation and prescription of the filter to your patient. Carl Zeiss Vision has a line of high quality filters medicinal and credibility. When receiving a prescription for medicinal filter in your store, ask Carl Zeiss Vision prescription lenses in your application or not graded.medicinal use of filters Zeiss (***): The filters F90, F80 and F60 are to Retinitis Pigmentosa and filters F580, F560 F540 are for Diabetic Retinopathy. See the examples in the illustration below.

Below is a sampling of the filter F60:

 Below is a sampling of the filter F80:

  Below is a sampling of the filter F90:

 Below is a sampling of the filter F540:

 Below is a sampling of the filter F560:

Below is a sampling of the filter F580:

The filters F452 and F451 are for monochrome and Achromatopsia Blue Cone. See examples in the illustration below.

Below is a sampling of the filter F451:

Below is a sampling of the filter F452:

The filters are applied medicinal Zeiss lenses exclusively on Zeiss 1.5 both in single vision as progressive in the modern Zeiss Technology Center in Petropolis