Anti-Reflective, or AR coating, added to your eyewear lenses can have multiple benefits.
AR coating can reduce reflections on your lenses. This makes your eyes more visible to those around you. AR coating can make a stronger prescription lens appear thinner. Inner lens reflections are also reduced.
AR coating comfortably reduces lens reflections from room and window lighting. It can reduce glare from computer screens and office lights. Outdoors, the coating reduces reflections from your eye and lids back onto the lens.
While driving, the coating helps reduce lens reflections from vehicles and windshields. This is also beneficial during low sunlight conditions. At night, halos from headlights can be reduced, improving your ability to see.
So, how does AR coating work? Several thin layers of AR coating are added to the front lens surface. Hot spot reflections are diminished. It is also layered on the back surface of the lens. These layers cancel light waves of back lens reflections.
Many people consider protecting their eyes from the effects of ultraviolet light found in our environment by adding UV light protection treatment to your lenses. Evidence suggests, that long term exposure to ultraviolet rays may cause cataract.
Small scratches can be disappointing and distracting. Buildup of very small scratches can cause a haze or glare from room and window lighting. It can reduce vision outdoors from sunlight and reflections and also causes problems in driving. A scratch-resistant coating is usually added to the front and back lens surfaces. The hard coating simply requires more force before being compromised. Coatings which resist dirt and water are also available. This reduces the need to clean lenses so frequently.
Photochromic lenses automatically change light to dark depending on lighting conditions. Outdoors, they darken, reducing brightness, and some glare. Indoors they lighten automatically. No eyewear switching is required, as they adjust in a few moments. Rose and purple produce the highest contrast against blues and greens. They are a good choice for wooded and water activities, and highlight water surface structure well. Green has obvious high colour distortion but good brightness and glare reduction. It produces the highest contrast of all tints, and is a good general-purpose tint. Amber reduces brightness and glare with a comfortable contrast level. It is a popular general-purpose tint and produces some colour distortion. Yellow and gold have very high colour distortion. They significantly increase contrast by reducing blue light - a good choice for snowy and shady wooded environments. Grey reduces brightness and glare while having the least colour distortion of all tints. It is a good choice for drivers not wanting to distort colour of traffic lights and signs. Grey is a great general-purpose tint.
Computer lenses are specially designed to reduce eye, neck, and body strain while working at a computer, whether at home, or in the office.
Bifocals, trifocals, and progressive lenses are not optimal for computer use. Tipping your head back is required to view the screen through these types of lenses. Doing this all day can cause neck strain. Also, the intermediate lens of progressive lenses can be narrow. Reading the screen requires notable side-to-side head movement.
Computer lenses are designed to reduce this eye, neck and body strain. The intermediate and near lenses are blended to work in harmony. The intermediate distance lens is strategically positioned higher in the frame. Tipping your head back is not required to view the screen.
In addition to the intermediate distance lens positioned higher in the frame, the intermediate lens is also wider. Less side-to-side head motion is required to read across the screen.
The upper lens is for mid-distance office comfort rather than far distances. Note, these lenses are not for driving. The lower lens is elevated, so less downward head and eye motion to the keyboard is needed.
Compared to other lens types, computer lenses reduce fatigue and body strain. They provide the least repetitive eye, head, neck, and body motion all day long.
Computer lenses are also recommended for those who perform other tasks at arm’s length. This includes crafters, artists and musicians.
Addition of an anti-reflective coating to computer lenses also helps reduce eye strain from computer screen glare and lens reflections from office lights. Consider a specially prepared pair of computer lenses, matched to your prescription, to improve your comfort at your computer.
This educational presentation is provided for a better understanding of the concepts behind the main lens types, and their value toward enhancing your vision.
Progressive lenses combine near, intermediate, and far distance correction into one lens. They are available as standard, advanced, and premium. All have a similar distance lens area, but their intermediate and near lens sizes vary. All are blended with no visible lines.
Standard progressive lenses have a wide distance lens above. They have a narrow intermediate distance lens in the middle. Their reading lens below is somewhat narrow. This type has notable side distortion below.
Premium progressive lenses have a wide distance lens above. They have a much wider intermediate distance lens in the middle. Their close reading lens below is very wide. The premium type has the least side distortion. As such, they provide the most visual comfort and ease of adjustment.
Choosing the right lenses for your particular needs, lifestyle, and comfort simply makes good sense.
If you have any other questions or concerns, please contact us at:
Dr Swati Agarwal -The Eye Clinic
2A Motilal Basak lane
Kakurgachi
Kolkata, WB 700054
www.swatiagarwal.in
+91 9147714355
[email protected]
Important Note
This information is provided for general educational concepts only. Your specific circumstances, conditions, treatment approaches, and results may vary from those shown here. Additional information, instructions, and precautions are to be provided by and discussed with your eye care provider.
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