PROSE Treatment

About BostonSight® PROSE Devices

Q. What is the difference between BostonSight PROSE treatment and Boston Scleral Lenses, the Boston Ocular Surface Prosthesis (BOS-P)™ and the Boston Scleral Lens Prosthetic Device?

A. Boston Scleral Lenses, Boston Ocular Surface Prosthesis (BOS-P), and Boston Scleral Lens Prosthetic Devices are all former names for the prosthetic devices made during BostonSight PROSE treatment.

Q. How are BostonSight PROSE devices different from commercial scleral lenses like the Jupiter?

A. It sounds like you are trying to determine the best treatment option for yourself or for a specific patient – BostonSight PROSE treatment or scleral lenses fit by other providers - and why.
Ultimately we cannot speak to the affordability or effectiveness of scleral lenses fitted by other providers for a variety of conditions with various treatment goals.

More information:
The ability to successfully replace or support impaired ocular surface system functions, reduce symptoms and improve vision is determined by three interdependent factors:
• The individual patient's needs, functional goals and capabilities
• The specific underlying condition(s) being treated and desired treatment outcomes
• The success of the fit, which is determined by the expertise and skill of the treatment team interfaced with the effectiveness / flexibility of the technology/tools/materials required to design and manufacture the devices or lenses

Therefore an assessment or comparison of effectiveness in reaching treatment goals can only be determined once a successful fit that has been achieved.

BostonSight PROSE treatment for complex corneal disease is provided by a highly trained medical team which includes a cornea specialist ophthalmologist, an optometrist who has completed an intensive nine-week BostonSight PROSE Clinical Fellowship, medical assistants, trainers, and prosthetic device manufacturing engineers and technicians. This team treatment approach allows BostonSight PROSE providers to custom design, fabricate and fit FDA-approved prosthetic devices unique to each patient that replace and/or support damaged ocular surface system functions in the context of treating underlying complex corneal disease.

PROSE treatment teams will work with each patient, their primary eye care provider, and support system to identify treatment goals and determine together whether PROSE treatment is the best choice for them.  BostonSight has over 20 years of experience in treating a wide range of rare corneal diseases and injuries; the benefits of PROSE treatment have been reported in dozens of peer-reviewed medical journal publications dating back to 1990. For a full list of our publications please go to
Q. How do I learn how to apply and remove the prosthetic devices?

A. The BostonSight PROSE treatment process includes extensive instruction and training in the care of your prosthetic devices, including handling, cleaning, storing, and application and removal, to ensure that every patient is comfortable and confident in their use. Most patients require at least three training sessions that are incorporated into the fitting process; some patients require many more sessions.  Often we train a family member or caregiver to assist in the beginning.  PROSE staff members are prepared to work with all patients, whatever their needs might be, to learn prosthetic device application and removal.  All BostonSight PROSE patients receive PROSE Treatment Guide: Prosthetic Device Use and Care.

Q. How long will it take to apply and remove my PROSE devices each day?

A. It may take up to 20-30 minutes for application and 5-10 minutes for nightly removal and cleaning for patients who have just received their prosthetic devices. While each patient is different, with practice the application process can take as little as 5 minutes. For patients that may require care-giver assistance or other accommodations, the application and removal process may take longer.

Q. Can my prescription be put in the prosthetic devices?

A. Usually BostonSight PROSE treatment can correct refractive error. Some patients require spectacles to be worn over PROSE devices for certain activities.

Q. How big are the prosthetic devices? Will other people be able to see them?

A. No two PROSE devices are exactly alike. Prosthetic devices are uniquely designed to fit each patient’s specific eye shape and treatment needs. PROSE devices can vary in circumference from approximately the size of a dime to a bit smaller than a quarter. The vault (the bowl shape and depth over the cornea) will also vary for each patient. Most patients report that other people do not seem to notice that they are wearing anything on their eye.