19/08/2019
Polaroid goggles are beneficial for our eyes
Polaroid goggles are available at Dr Verma's Opticians 90 A Market Sector 6 Bhilai
Cost RS 2250/- with case
Polaroid spectacles are an excellent example of use of technology for improving our vision.
In day to day life we frequently come across situations where glare bothers us and affects our vision. it could be bright midday sunlight especially during summer, poor lighting at night, the harsh headlights of approaching vehicles, eye strain & photophobia due to prolonged staring at the electronic screens, low contrast & colour perception causing accidents. In all the adove instances polarized lenses can prove to be of great help, let's see how it works.
Light is basically a electromagnetic wave made up of light particals known as photons, light ray's are basically shower of these particals. During propagation photons vibrates at axis right angles to it's direction of travel and their wavelength (distance travelled in one cycle of vibration) is perceived by us as colour of light.
In light Ray's photons can be vibrating in any of the 360* direction in plane perpendicular to direction of propagation. When they strike a object they bounce back to us with it's information so we can see the object but few of them causing glare (light cloud) or reflections (shines) which affects our vision, intense light beam (too many photons) bounce back to hurts our eyes. It is observed that incoming photons who are vibrating horizontally contributes to glare while those vibrating vertically helps in good vision, it also improves contrast and increases our visual acuity.
Polaroid lenses are made up of celluloids stretched vertically so it's molicules are vertically arranged acting as a series of vertical slits on it's surface. It only allows those photon to pass which are vibrating vertically. Horizontal & obliquely vibrating photons are blocked so number of photons in a light Ray's passing through this filter is reduced making it non hurting, it increases visual acuity, increases contrast, increases colour perception & overall quality of image.
You can veiw comfortably in bright sunshine, in glare reflected by snow, in brightened electronic screen, the good 3D & colour perception gives less stress to eyes, you can appreciate surface texture very well, it also cuts traffic light glare at night driving, you will be able to see dogs & other animals standing in shadows, you can see roads also very well even if light is less. All these improves your visual judgement and prevent accidents or untowards events. In night vision Amber coloured lenses and Antireflective coating also work.
Sometimes you may not feel benefits in night vision in following conditions
- You are still using your old glasses, when your eye power has changed
- If you are driving vehicle, your windshield glass is not clean from outside as well as inside
- Your Spectacles lenses are scratched, not clean, has oily layer or fogged
- You have some eye disease/situation like cataract, corneal opacity, multifocal IOL, high myopia with weak retina, retinal diseases involving rods, peripheral retina, etc.
Polaroid lenses can not be made of your eye power, they have zero power and mostly tinted, for those who already wear their power spects, they have to wear them over their specs as clip on lenses or as bigger goggle over their prescription specs
