Volk University: Clean Up Your (Lens) Act

Welcome to “Volk University” where we invite you to learn more about the selection, use and care of your favorite Volk products.


Today’s lesson: Cleaning Non-Contact Exam Lenses. Read on for some do’s and don’ts of how to keep your Volk BIO and slit lamp lenses clean and clear for the best possible imaging. Regular care to remove smudges, oils, make-up, lint, and water spots will keep your non-contact lenses in great shape for years to come.




  • rinse lens under warm running tap water.
  • use a very soft, non-abrasive sponge, with a mild detergent, such as Dawn soap, to gently clean the lens surface.
  • clean lens one side at a time in a clockwise direction. Cleaning in a counter-clockwise direction may loosen the glass element from the ring over time.
  • dry the lens with a low-lint cotton, or cotton-synthetic towel. Old school baby diapers are a great choice. Microfiber cloths can be used to dry a wet lens, as long as the microfiber cloth and the lens are clean.




  • scrub hard or rub the lens surface with force. This could cause damage to the anti-reflective coating over time.
  • use microfiber cloths on a dirty dry lens. They can be used only if clean, to dry a clean, wet lens.
  • dry lenses with paper products such as napkins, paper towel, or Kim Wipes as these may scratch the lens surface over time.
  • air dry your lens; water droplets left to dry on the surface of the lens may deposit hard water minerals which will cause damage to the coating.

For quick, convenient cleaning, Volk also offers the Lens Pen and Precision Optical Lens Cleaner (POLC) wipes. The Lens Pen has a lint brush on one end and a carbon-fiber tip to gently remove smudges on the other end. Always be gentle with the Lens pen! POLC wipes are pre-moistened with an ethyl alcohol cleaning solution that dries instantly.

To learn more about cleaning Volk lenses, including disinfection and sterilization procedures, see our full care guide.

Volk University: Picture Perfect Medicare Reimbursement

Welcome to “Volk University” where we invite you to learn more about the selection, use and care of your favorite Volk products.


Today’s lesson: Imaging and Reimbursement. Volk’s portable imagers-the Pictor Plus and iNview-are becoming essential clinical tools to aid in diagnosis, documentation and telemedicine, and their fundus exams are eligible for Medicare reimbursement. Here’s how to make sure your exams conform to the Medicare reimbursement guidelines.


Volk’s Cameras

Pictor Plus is a handheld ophthalmic camera with high resolution retinal imaging capabilities.



iNview is an iPhone compatible lens attachment that enables wide-angle fundus photography using Volk’s free iNview app and the iPhone’s camera.

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Medicare’s Guidelines

Imaging with either device is covered similarly. To help physicians comply with Medicare’s guidelines, Volk has provided a reimbursement guide from Corcoran Consulting group, available for download.


A few highlights from these FAQs:

  • The CPT Code is 92250, Fundus photography with interpretation and report. When bundled with other tests or used in telemedicine, other codes apply, see guide for detail.
  • For coverage, Medicare requires a medical indication for the exam: diabetes, high blood pressure, glaucoma risk factor, acute macular degeneration, retinopathy of prematurity, observed abnormality, etc. Images taken as baseline documentation or preventative screening are generally not covered.
  • The patient chart should contain specific documentation beyond the resulting digital images, including: rationale, findings and diagnosis, see guide for a full list of required information.


Volk University: Lenses, Lenses and More Lenses

Welcome to “Volk University” where we invite you to learn more about the selection, use and care of your favorite Volk products.






Today’s lesson – Lenses. What’s special about Volk lenses and what’s the difference between the more than 180+ lens options we offer.


Volk Lens Basics

  • Volk lenses are aspheric on both sides of the lens-many other lenses are only aspheric on one side. An aspheric surface delivers a crisper image to eliminate distortion. Volk’s double-aspheric lenses eliminate more distortion for better overall imaging.
  • The Diopter value of a lens is a unit of refractive power of an optical lens, and is denoted by the inverse of the focal length of the lens.
    • A lens with a higher Diopter power provides a wider field of view, lower magnification, and the best performance through small pupils.
    • Lenses with a lower Diopter power have a narrower field of view, higher magnification, and do not perform well through a small pupil.


  • Lens orientation makes a difference.
    • Double aspheric lenses are not always symmetric on both sides. A lens with asymmetric aspheres will produce different optical results depending on which side of the lens you look through. Therefore, proper orientation is required for peak performance.
    • The Volk “V” is like an arrow and is designed to point towards the patient. Orient your lens with the point of the V pointing at the patient.
    • Some lenses have a silver rim on one side of the ring – the silver rim is another indicator of orientation. The silver rim should always be on the side of the lens closest to the patient.


  • “Working distance” (distance of the lens to the patient’s eye) varies by lens. Ensuring the lens is at the right focal length will ensure the finest clarity, depth of focus, and field of view. Refer to your lens’ instruction manual, Volk’s website, or a Volk catalog for listings of working distances.
  • Most lenses are optimized for use at lower slit lamp magnification settings. Increasing the slit lamp magnification may introduce image distortion and aberrations.
    • Suggested slit lamp magnification power for Volk lenses is 6x– 16x, where 10x is the optimal mag. 25x and 40x are too high and will likely cause distortion in the image.