TYPES OF EYE GLASSES : JAINAM LENSES

TYPES OF EYE GLASSES

How to protect your eyes from strain?

 

Eye Exam:

Having a routine comprehensive eye exam is the most important thing you can do to prevent or treat computer vision problems. If you haven't had an eye exam in over a year, schedule a visit with an eye doctor near you.

According to the National Institute of Occupational Safety and Health (NIOSH), computer users should have an eye exam before they start working on a computer and once a year thereafter.

Symptom:

 

When you work at a computer for any length of time, it's common to experience eye strain, blurred vision, red eyes and other symptoms of computer vision syndrome (CVS). This is because the visual demands of computer work are unlike those associated with most other activities. When concentrating on a visually intense task, such as continuously focusing on a book or computer monitor, the ciliary muscle tightens. This can cause the eyes to get irritated and uncomfortable.

Exercise your eyes.

A routinely recommended approach is to consciously blink the eyes every now and then (this helps replenish the tear film) and to look out the window to a distant object or to the sky—doing so provides rest to the ciliary muscles. One of the catch phrases is the "20 20 20 rule": every 20 minutes, focus the eyes on an object 20 feet (6 meters) away for 20 seconds. This basically gives a convenient distance and timeframe for a person to follow the advice from the optometrist and ophthalmologist. Otherwise, the patient is advised to close his/her eyes (which has a similar effect) and relax the face and neck muscles for two minutes, at least every half-hour.

Another exercise is to look far away at an object for 10-15 seconds, then gaze at something up close for 10-15 seconds. Then look back at the distant object. Do these 10 times.

Giving the eyes a chance to focus on a distant object at least once an hour usually alleviates the problem.

Consider computer eyewear/Lenses.

For the greatest comfort at your computer, you might benefit from having computer glasses. This is especially true if you normally wear contact lenses, which may become dry and uncomfortable during sustained computer work.

Computer glasses from Jainam are a good choice if you wear bifocals or progressive lenses, because these lenses generally are not optimal for the distance to your computer screen. Also, you may want to reduce your exposure to potentially harmful blue light emitted by digital devices.

        

Lens Designs:

Your eye exam will determine what kind of lens design you need. Most people only need correction at a single distance. If you're over the age of 40 you may need correction at multiple distances. Your optometrist will determine what lenses will provide you with best corrected vision. There are a few different lens designs:

Single Vision - Single vision lenses are prescribed if you need correction for one field of vision, either for distance, intermediate (computer), or items up close (near). Single vision has the same optical focal point or correction over the entire area of the lens.

Lined Bifocals - With a bifocal, the upper part of the lens is used for distance vision, while the lower part is used for near vision. A visible line separates the two sections.

Blended Bifocals - Just like a regular bifocal the lens has two sections, one for distance and one for near. The difference is, the blended bifocals doesn't have a visible line. Instead the near segment of the lens is in the shape of a half circle and is blended into the distance portion of the lens so that is virtually invisible.

Lined Trifocals - These lenses are similar to bifocals, except that the two focal areas are separated by a third middle area with intermediate focus correction. This area is used for intermediate vision, like computer distance.

Progressives (No-Line Bifocals) - Progressive lenses or No-Line Bifocals provide a smooth transition from distance correction to near correction, eliminating segment lines and allowing clear vision at all distances, including intermediate.

Why Computer Glasses?

Computer glasses differ from regular eyeglasses or reading glasses in a number of ways to optimize your eyesight when viewing your computer screen.

Jainam Lens is one of the newest lenses designed to optimize vision and comfort during digital device use. It's available in both prescription and non-prescription.

Computer screens usually are positioned 20 to 26 inches from the user's eyes. This is considered the intermediate zone of vision — closer than driving ("distance") vision, but farther away than reading ("near") vision.

Children and young adults who need prescription eyeglasses usually are prescribed single vision lenses. These lenses correct the wearer's near-sightedness, farsightedness and/or astigmatism, and the shape of the lens inside the eye automatically adjusts to provide the extra magnifying power required for computer vision and near vision.

When a person's close-up vision becomes less clear due to presbyopia after age 40, this age-related loss of natural focusing power affects reading and seeing a smartphone or computer vision clearly and comfortably. Bifocals can provide clear distance and near vision, but intermediate vision (needed for computer use and seeing your smartphone) often remains a problem. And progressive lenses or trifocals, though they offer some help for intermediate vision, often don't have a large enough intermediate zone for comfortable computer work.

Without computer eyeglasses, many computer users often end up with blurred vision, eye strain, and headaches — the hallmark symptoms of computer vision syndrome. Worse still, many people try to compensate for their blurred vision by leaning forward, or by tipping their head to look through the bottom portion of their glasses. Both of these actions can result in a sore neck, sore shoulders and a sore back.

Though they sometimes are called "computer reading glasses," it's best to call eyewear designed specifically for computer use "computer glasses" or "computer eyeglasses" to distinguish them from conventional reading glasses.

Generally, computer glasses have about 60 percent the magnifying power of reading glasses. But the optimal magnification depends on how far you prefer to sit from your computer screen and how close you like to hold your digital devices.

Computer glasses also should accurately correct any astigmatism you might have, and precise measurements should be taken to insure the optical centre of each lens is directly in front of your pupils when you are using your preferred working distance.

For these reasons, computer glasses should be customized to your individual needs. Using weaker, non-prescription reading glasses for computer work and seeing your digital devices typically won't provide the accurate vision correction you need for sustained clarity and comfort.

Computer glasses put the optimum lens power for viewing your computer screen right where you need it for a clear, wide field of view without the need for excessive focusing effort or unhealthful postures. University research also shows custom computer eyewear can significantly increase worker productivity.

Lens Designs for Computer Eyewear

Jainam lenses are prescribed specifically for computer use, they are also suitable for driving or general-purpose wear.

 

 

Bifocal Lenses - Design and Technology

What are bifocal lenses? Bifocal lenses are dual-vision lenses that provide vision for both- distant and closer objects. They are created using two distinct areas of vision correction, differentiated by a line crossing across the lenses. While the top area is used for seeing distant objects, the bottom portion is for near-vision.

Bifocal eyeglasses frames are ideal for people suffering from presbyopia, a condition in which they experience blurred or distorted near vision while reading. Due to this, their eyes constantly struggle to focus on books, magazines and other reading materials. This leads to headache, eye strain and fatigue. Which is why, it is recommended to wear bifocal glasses if you have the problem of reading at your arm’s length.

Bifocal Lenses - Segment Shapes

 

In bifocal lenses, the lower lens segment which is also known as ‘seg’ comes in 4 shapes:

·         Half-moon, resembling a D segment

·         Round segment

·         Narrow rectangular segment

·         Franklin, E style or Executive style (full bottom half of the lens)

How Bifocals Are Fitted

Bifocals typically are placed in a way that the line between the two lenses rests at the same height as the wearer's lower eyelid. As the wearer drops his eyes in a downward direction, the eyes automatically seek the lower-section or the near-vision portion of the lens.

Benefits of Bifocal Glasses: -

Multifocal lenses having power of two lenses. Allow you to see distant and closer objects through a single type of lens. Ideal for aging people and those dealing with problems like presbyopia and eye teaming. May help control myopia in children. They are also available as special glasses for computer.

Jainam Lenses Provides you smooth transition from distance vision through intermediate vision to near vision.

Progressive Lenses

Lenses with A Latest Technology 4r A Sharp and Comfortable Vision

In people who are maturing (in their 40s or older), vision problems might occur sooner or later in life, resulting in reduced eye power and deteriorated vision health. And, this is where Jainam Premium progressive lenses come like a blessing because they are considered as the most natural way for achieving a clear vision. They are multifocal lenses that are designed to offer you with a seamless progression of varied lens powers for all viewing distances.

One Lens and Three Invisible Zones

Made using state-of-the-art optical technology, progressive lenses provide greater comfort level to the wearer helping him maintain clear vision at all distances- near, far and intermediate.

Since, progressive lenses encompass a graduated range of vision varying from a distant zone to closer objects including intermediate zone, it creates annoying distortions in the lens periphery. However, with the advancement in technology, the design and production methods (computerized modelling and digital freeform manufacture) of these lenses have evolved over the years. And, today, you will find these progressive lenses with precise curves on surface of the lens and reduced peripheral distortion. This offers you with a better, clear and seamless vision.

Consult an eye care professional who will do his analysis about the vision health of your eyes to suggest you with the right types of progressive lenses.

The progressive lenses cost starts from 3000 INR to 29,000 INR for superior lenses. The progressive lens price usually differs for the kind of quality offered. Please write an e-mail to us separately if you want high quality custom made lenses.

Computer vision syndrome causes eye fatigue, which can make you feel tired in general.

The simplest computer glasses have single vision lenses with a modified lens power prescribed to give the most comfortable vision at the user's computer screen. This lens power relaxes the amount of accommodation required to keep objects in focus at the distance of the computer screen and provides the largest field of view.

Single vision computer glasses reduce the risk of eye strain, blurred vision and unnatural posture that can cause neck and back pain, and can be used comfortably by young and old computer users alike.

Another popular lens design for computer glasses is the occupational progressive lens — a no-line multifocal that corrects near, intermediate, and, up to a point, distance vision.

Jainam Premium Occupational progressive lenses have a larger intermediate zone than regular progressive lenses for more comfortable vision at the computer. But this leaves less lens area for distance vision, so these lenses are not recommended for driving or other significant distance vision tasks.

Other lenses used for computer glasses include occupational bifocal and trifocal lenses. These lined multifocal lenses have larger zones for intermediate and near vision than regular bifocals and trifocals, and the position of the intermediate and near zones can be customized for your particular computer vision needs.

Your optometrist or ophthalmologist can help you decide which lens design will best suit your needs for computer glasses. Even if you don’t require lens with power; you can use zero power lens (non-prescription lens) for blocking harmful & polluting light.

 

 

Do Contact Lens Wearers Have More Computer Vision Problems?

Because so many computer users wear contact lenses, researchers in Spain reviewed published studies to see if contact lens wear increases the risk of computer vision problems or causes a worsening of computer vision syndrome.

The investigators found 114 studies written in English or Spanish and published from 2003 to 2013 that referenced both contact lenses and computer use. They chose six studies for final analysis.

All six revealed that contact lens wearers were more likely to have computer vision syndrome symptoms than individuals who wore eyeglasses only or did not need corrective lenses. Prevalence of symptoms ranged from 17 to 95 percent among contact lens wearers and 10 to 58 percent among non-wearers. Also, contact lens wearers were four times more likely to have dry eyes during or after computer use, compared with non-wearers.

Silicone hydrogel contact lenses were associated with more comfort than regular soft lenses among computer users.

The study authors concluded that, during computer use, contact lens wearers suffer more eye discomfort and visual disturbances than non-wearers. But they also stated that, due to the small number of studies included in their analysis and the non-conclusive nature of some findings, more research is needed to determine the best type of contact lenses for computer users and how the lenses should be used.

A report of the study was published in the March/April 2014 issue of the journal Revista Espanola de Salud Publica.

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