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Home » Eye Care Services » Your Eye Health » Vision Over 40 » Occupational Bifocal and Trifocals

Occupational Bifocal and Trifocals

Occupational bifocals and trifocals are specialized multifocal lenses created for specific jobs, hobbies or tasks. They are designed for people – generally over 40 – who have developed presbyopia, a condition in which the lens of the eye weakens and it becomes difficult to see objects that are close up. They differ from regular multifocal lenses in that the magnified power areas to see close and intermediate objects are typically larger and positioned in a different area on the lens, according to needs of the designated task.

Occupational bifocal and trifocal lenses are intended for specific tasks and not for everyday use. Here are a few examples:

Double-D Lenses

The most popular type of occupational lens is the Double-D lens. The lens is divided into three segments, with the top designed for intermediate vision, the bottom segment for near vision and the rest for distance. This design is ideal for people who need to see close both when looking down (to read something) and when looking overhead. Professionals that frequently use Double-D lenses are auto mechanics (who have to look overhead when under a car), librarians, clerks or office workers, (who have to look at shelves overhead) or electricians (that are often involved in close work on a ceiling). They are called Double-D lenses because the intermediate and near segments of the lens are shaped like the letter “D”.

E-D Trifocal Lenses

As opposed to Double-D lenses which have the majority of the lens for distance vision, E-D lenses focus on intermediate vision with an area for distance on the top and for near vision on the bottom. These are ideal for individuals who are working at about an arm’s-length away the majority of the time, such as on a multiple computer or television screens, but frequently need to look up into the distance or close to read something. The “E” in the name stands for “Executive Style” which represents the division between the top distance vision lens and the bottom intermediate vision lens which goes all the way across the lens. “D” in the name of the lens is due to the fact that the near section in the bottom of the lens is shaped like a “D”.

Office or Computer Glasses

Multifocal lenses designed for office work provides the largest section with an intermediate lens designated for viewing the computer screen and a smaller area for limited distance vision. You can have progressive or trifocal lenses that incorporate near vision as well.

Golf Bifocals

That’s right, there are even specialized lenses made for golfers! Golfers need to see a wide range of distances during their game from their scorecard, to their ball on the tee, to hole far away to line up their drive. In these lenses, the close segment is small and placed on an outer corner of one lens, to allow for brief close vision but not interfere with the distance game. Usually, right handed golfers will have the lens on the right side and vice versa.

Personalized Lenses

Standard multifocals can be redesigned to adapt to specific tasks or hobbies simply by changing the size, shape or location of the different segments. Many adults over 40 would benefit from having multiple pairs of multifocals to give optimal vision for different tasks or hobbies they enjoy. Note that occupational lenses are made specifically for the task they are designed for and should not be worn full-time, especially while driving.

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Dr. Inns is a 1982 graduate of the University of Houston College of Optometry. He holds a Bachelor of Science degree from Wilfred Laurier University, Canada. During his training at the University of Houston, he held positions in research and was a teaching assistant / laboratory instructor.

Postgraduate work includes therapeutic courses at Pennsylvania College of Optometry and the Optometric Glaucoma Specialist Course at the University of Texas Medical School. Dr. Inns has published in Optometry Today and Optometric Management. He also volunteers at the schools in his area.

Dr. Inns and his wife, Lynn, spend much of their spare time calling and visiting with their four boys.

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Amber Draper, Manager

As the manager of The Woodlands office, Amber Draper leads the team with the focus on patient care and assisting with their ophthalmic needs. Having over 10 years experience, Amber can aid patients with the most appropriate lens technology to match their daily needs. Everyone needs at least one pair of sun wear, especially here in Texas.

Amber is a proud graduate of Sam Houston State University with a BA in History, and a minor in Spanish.

In her spare time, she is with family, friends, and enjoying some Houston Texans Football.

Dr. Toups is a 1984 graduate of the University of Houston College of Optometry. He has a Bachelor of Science degree in Pharmacy from Northeast Louisiana University.

Being a therapeutically licensed optometrist, Dr. Toups is trained to diagnose and treat ocular conditions. He specializes in contact lenses and he is current with all refractive surgery procedures.

Dr. Toups is married, has five children and has lived in the Houston area since 1980.