Thank you for your interest in learning about the Ocutech VES-Sport. The Sport is Ocutech’s best-selling Keplerian bioptic telescope system due to its quality optics, ease of fitting and prescribing and its high patient acceptance. This short presentation will share with you everything you need to know to fit, prescribe and order the VES Sport.
Ocutech’s innovative Keplerian optical design, called the Vision Enhancing System or VES, combines a telescope and a periscope together to create an ergonomically better designed spectacle mounted device. Instead of the image going straight through the system, the image enters through the front window, makes a right-angle turn, goes across the front of the frame and then makes another right angle turn to enter the eye.
All of Ocutech’s systems have been designed to provide the widest field of view possible In a design that is comfortable to wear, appealing, and easy and convenient to fit and prescribe. Originally developed with grants from the National Eye Institute, Ocutech’s VES systems have been proven effective in independent clinical trials.
The VES Sport is available in both 4x and 6x powers. The 4x provides a 12.5 degree field of view and can focus to as close as 9 inches. The 6x Sport provides a 9.6 degree field of view and can focus to as close as 12 inches. Ocutech offers the Sport in an array of colors– even hot pink, a favorite for many young albino ladies!
The VES Sport is attached to the frame using the bridge mounting assembly as shown in photo 1, which includes a positioning rod that is held in place by two silver Phillips screws. Photo two shows the mounting sleeve on the back of the sport which is slid over the positioning rod to hold the telescope in place. By loosening the Phillips screws slightly, the Sport can be easily aligned for the eye that will be using the telescope. By further loosening the screws, as shown in photo 3, the telescope can be slid off the positioning rod and flipped over to allow it to be used by the fellow eye. Be careful not to loosen the screws too much to avoid disengaging them from the positioning rod. On occasion and especially with smaller eye-size frames, you may have to bend the frame slightly to completely disengage the telescope from the positioning rod. Once you’ve got the telescope positioned properly, just tighten the screws until they are snug and the telescope does not move. There is no need to over-tighten the screws.
There are just three simple steps to positioning the VES-Sport.
In step one, simply loosen the two silver Phillips screws slightly but not so loose that it won’t stay in position. Then simply slide the sport right or left to align the eyepiece with the center of the patient’s pupil.
In step two, adjust the eyeglass frame nosepads so that the bottom of the eyepiece aligns with the top of the pupil.
In step three, ask the patient to drop their head down slightly and look up into the eyepiece and adjust the telescope viewing angle to match your patient’s line of sight.
That’s all there is to it. Practice it a few times with a staff member and you’ll find just how easy it is.
The VES-Sport eyepiece extends through the carrier lens in order to offer the widest field of view possible. When you order the system, the carrier lens will be ‘slotted’ to allow the eyepiece to pass through. The slot is made slightly oversized to allow for fine-tuning at the dispensing visit. Once you have determined the ideal position of the eyepiece, use a millimeter rule to measure from the center of the bridge to the center of the eyepiece to determine the proper eyepiece position.
Ocutech’s metal frames area available in 3 styles– the K, Unisex and Sleek. They are available in a full range of eyesizes and colors and with both skull and cable temple options. Even pediatric sizes are available. The eyesize of each frame is engraved on the left side of the center of the bridge as shown at the red circle. Visit Ocutech’s website for complete information. All frames are provided with large nosepads and a head strap to help keep the systems firmly in place.
Patients rarely have difficulty seeing everything they need to see when their visual acuity is 20/40. It’s reasonable then to use 20/40 as the prescribing goal for acuity through the telescope. Prescribing a higher power will be at the cost of a narrower field of view.
So, the 4x Sport will be appropriate for individuals with best corrected distance visual acuity (BCVA) of 20/160, and the 6x for individuals with BCVA of 20/240. Many prescribers will accept 20/50 as an acceptable acuity goal so that the 4x may be successful for individuals with 20/200, and the 6x for those with 20/300.
Visually impaired individuals with central vision loss from genetic and developmental disorders as well as individuals with well circumscribed age-related macular defects usually respond very well to the VES-Sport.
We recommend that you prescribe carrier lenses consistent with what your patient normally wears even bifocals. We suggest that you avoid trifocals and progressives as there is usually insufficient room in the frame to provide adequate distance viewing area.
Be certain to provide at least 10mm from the bottom of the eyepiece to the top of the bifocal segment. Ocutech’s frame tech sheets list suggested bifocal segment heights. If you’re not certain what to specify, just write “Standard” and Ocutech’s order department will know what to do.
Since the VES-Sport has a very wide focusing range, most all distance refractive errors can be covered without an eyepiece correction. If during testing your patient is achieving the acuity goal you seek without an eyepiece correction, then none is needed. Eyepiece corrections should be considered with spherical refractive errors beyond + or – 12 or with cylinder above 3 diopters.
Both the 4x and 6x Sports focus to very close working distances using the central focusing wheel. Snap on-and-off reading caps are also available in most any power you choose.
When viewing targets at very close distances individuals may at first encounter difficulty locating what they want to see. The parallax adjustment screw will allow the prescriber to change the position of the entrance mirror to align the Sport’s optics for near viewing ranges. This is performed by using an optical screw driver to gently push down on the alignment screw while turning the screw head to the near position. This requires only a very slight movement. This adjustment is recommended when the Sport is intended for use primarily inside of arm’s length. The Sport is shipped with the optics in the standard distance position. Ocutech recommends that this parallax adjustment setting be made by the prescriber at the dispensing visit.
Ocutech offers slip-behind sunfilters in 5 colors that match the shapes of all Ocutech metal frames. They can be ordered with or without a slot so you can specify whether you want the telescope eyepiece covered by the filter.
Snap-on-and-off filter caps are also available in all 5 filter colors.
Ocutech has produced a convenient bioptic prescribing worksheet that will take you, step-by-step, through the process of demonstrating bioptics, determining the prognosis, and for making prescribing decisions. Feel free to contact Ocutech to request your copy of this very helpful form.
To support the low vision specialist, Ocutech has strived to make telescope prescribing as easy, convenient and risk-free as possible. Our very knowledgeable technical support staff is available to answer all of your questions.
Thanks so much for your interest. Feel free to contact us to learn more about Ocutech’s full range of telescopic products for the visually impaired.