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Lancaster, PA 17602
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Home » Eyeglasses & Contacts » Contact Lenses » Bifocal and Multifocal Contact Lenses

Bifocal and Multifocal Contact Lenses

If you are over 40 and have difficulty seeing close up, you probably have a common age-related condition called presbyopia which is when the eye’s natural lens loses the ability to focus on close objects. Presbyopia is a natural process as the eye ages and affects the majority of people from age 40 and upward. Individuals with presbyopia are often familiar with the need to hold reading materials such as newspapers an arm’s length away from their eyes in order to see clearly, yet reading glasses with bifocal or multifocal (progressive) lenses can help.

Fortunately for those who don’t like the look, feel or inconvenience of reading glasses, there is another option. Bifocal and multifocal lenses are also available in contact lenses in both soft and Rigid Gas Permeable (RGP) varieties.

Multifocal contact lenses give you added freedom over glasses and they allow you to be able to view any direction – up, down and to the sides – with similar vision. People wearing progressive lenses in glasses on the other hand have to look over their glasses if they want to view upwards or into the distance.

The Difference Between Bifocal and Multifocal Lenses

Just as the name indicates, bifocal lenses are divided into two distinct segments for different vision powers, the first for distance vision and the second for near vision. This enables you to clearly switch your focus from near to far as needed, but your vision will not necessarily be clear in between. The term multifocal lenses can refer to any lenses with multiple powers including bifocals, trifocals or progressive lenses. Non-bifocal multifocal lenses have a range of powers that enable you to constantly adjust your focus to see clearly from up close to far and in between.

Multifocal contact lenses are generally designed in one of two ways, as either simultaneous vision lenses or alternating vision lenses.

Simultaneous vision lenses

The most popular version of multifocal contact lenses, simultaneous vision lenses present the distance and near vision zones of the lens at the same time. Typically after a short adjustment period your eyes learn to utilize the segment of the lens that they need to focus on the desired object and essentially ignore the other.

They come in two designs:

  • Concentric ring design: In the most basic form these are bifocal lenses that are comprised of a central circular area of one power with a ring around of the alternate power, similar to a bulls-eye. In this design the power of the rings (either near or distance vision is interchangeable). For intermediate viewing (18-24 inches away) extra rings can be added to create a trifocal or multifocal lens. The width of each ring is variable depending on the power that is needed most and the edges of the rings can be blended for a smooth transition of focus, similar to progressive eyeglass lenses.
  • Aspheric design: These multifocal lenses attempt to provide a natural vision experience by blending many lens powers across the surface and center of the lens. In this design both distance and near vision power are located in the central visual area and your eyes will adapt to focus on the area needed to view what you are looking at.

Translating or Alternating Vision lenses

Similar to bifocal eyeglass lenses, these contacts are divided into distinct areas or zones and your pupil will move to the desired zone depending on your vision needs. Typically the top of the lens, which is what you look through when looking straight ahead is for distance vision and the bottom area (what you look through when you look down) is for near vision. However, this can be reversed according to unique vision needs.

Since contact lenses sometimes move within your eye, translating lenses are held in place by a ballast which is an area that is thicker than the rest of the lens or by truncating or flattening the bottom to stay in line by the lower lid. These lenses are only available in rigid gas permeable lens material.

An Alternative Option to Multifocal Contact Lenses: Monovision

Monovision is another contact lens alternative for presbyopia particularly if you are having

difficulty adapting to multifocal lenses. Monovision splits your distance and near vision between your eyes, using your dominant eye for distance vision and your non-dominant eye for near vision.

Typically you will use single vision lenses in each eye however sometimes the dominant eye will use a single vision lens while a multifocal lens will be used in the other eye for intermediate and near vision. This is called modified monovision. Your eye doctor will perform a test to determine which type of lens is best suited for each eye and optimal vision.

Are Contact Lenses Right for You?

If you have presbyopia, contact lenses may be a great option for you. Many people prefer the

look and convenience of contact lenses over traditional reading glasses. Speak to your eye

doctor about the options available to you.

Dear Patients,

We will be reopening our office Monday, May 18, 2020, and would like to bring you up to date with the many very important physical and procedural changes we have made to our office to assure the highest level of health and safety for our patients and staff during these very challenging times.

We have consulted with our county, state and federal officials, as well as the CDC and other healthcare professionals, to incorporate the recommended and required safety measures throughout our office.

We sincerely apologize for any inconvenience we may have caused by rescheduling or postponing your earlier appointments.

To assure the health and safety of our staff and patients, as well as minimize any exposure, we have instituted the following changes. Please read through this entire document and print a copy so you are familiar with them.

1. Any and ALL appointments and visits will need to be scheduled. This includes the pickup of eyeglasses or trial contact lenses, frame selection, eyeglass repairs, and eyeglass adjustments.

2. Contact lenses will be shipped to all patients at no charge

3. To maintain social distancing and minimize any possible exposure, we have spread out our patient schedule.

4. 24-48 hours before your appointment, one of our staff will be calling to remind you of your appointment and discuss your ocular and medical history. In addition, they will ask you standard COVID19 screening questions and answer any questions regarding your upcoming exam. This will take 5 – 10 minutes but this initial call is important to allow you ample time in our office.

Please look for and answer this call.

5. In order to save time and keep everyone on schedule, any and all medications you are taking should be listed in as much detail as possible on a separate piece of paper, emailed to our secure site: DROXENBERG@COMCAST.NET, or entered on the patient registration form on our website: WWW.DROXENBERG.COM. This needs to be completed prior to your appointment and should include all systemic medications (diabetes, hypertension, etc.) and ocular medications (eye drops, glaucoma medicine, etc.).

6. On the day of your appointment please plan to arrive 15 minutes early and call us at (717) 394-3798 when you arrive. We will return your call when you will be allowed to enter. Entry will be through the front door only unless previously discussed with our staff. Only the person with the appointment will be allowed in the office with the exception of minor children who have the appointment. NOTE: Family members and/or friends will need to wait outside.

7. We will be taking your temperature in the vestibule and anyone with a temperature of 100 degrees or higher or who is sick will be rescheduled. If you feel ill, please reschedule your appointment.

8. All staff will have their temperatures checked 2 times daily for your safety.

9. All staff will wear a facemask while in the office. In addition, all patients must wear a facemask while in the office as mandated by Governor Wolf for all PA businesses. If you do not wear a facemask, one will be provided to you.

10. There are hand sanitizing stations strategically placed throughout the office. Please use them.

11. All frames will be disinfected before and after being handled by patients and staff. Frames will not be returned to the frame display until they are appropriately disinfected.

12. All exam room equipment will be cleaned and disinfected before and after each use according to the CDC guidelines.

13. Cleaning and disinfection of our office have always been a priority and this will continue in earnest.

14. Preferred payment is by credit card or checks at the time of services but cash will be accepted.

15. We have installed a plexiglass barrier on our front desk to comply with the CDC and state guidance.

16. Reception area chairs have been separated to maintain social distancing.

17. Patients who are physically disabled will be allowed entry through the rear door, with prior approval, following a temperature check and COVID19 screening. All other patients must enter through the front door and screening vestibule.

18. Above all else, your safety and health are our top priorities. We take this responsibility very seriously and have implemented these changes in procedures to achieve this.

Dr. Oxenberg has been providing eye care to you and your family since 1990 and expects to continue for many years to come.

If you have any questions and /or concerns, please feel free to email our office at droxenberg@comcast.net or call (717) 394-3798.

We look forward to seeing you all again!

Sincerely,

Dr. Larry Oxenberg