VisiScreen® OSS-C Ocular Screening System
Now there is a fast, effective in-clinic screening system for the early detection of eye problems.

Powerful New Screening Tool

The OSS-C Ocular Screening System greatly increases the ability to screen for a wide range of ocular problems. It is a significant advance over existing screening methods. The OSS-C was developed at and patented by NASA, and it is manufactured and marketed by Vision Research Corporation under exclusive license from NASA.

Fast, Simple, Effective

The OSS-C is based on photorefractive technology. It takes a detailed, highly precise photo of the subject's eyes that can then be analyzed for a wide range of problems. Operation of the OSS-C is as fast and simple as taking a photograph, and it is easily performed by office and non-technical personnel.

No Eye Drops and No Response Required

From the child's point of view, the process is literally as simple as having a picture taken. There are no questions to ask, and no responses to watch for or record. Less than a minute in a darkened area is sufficient to adequately open the pupils prior to the photo.

Equally Effective for Infants and the Physically Impaired

Because no response is required from the patient, the OSS-C is equally effective for infants from age 6 months, and for the physically impaired and other patients where responses are a problem.

Screens for a Wide Range of Eye Problems

The OSS-C screens for refractive errors, anisometropia, constant alignment errors, ocular media opacities, and other visible eye abnormalities. Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and with-the-rule and oblique astigmatisms. Anisometropia is a difference in the refractive power of the two eyes that can indicate or lead to amblyopia. Alignment errors include constant inward turning of the eye (esotropia), outward turning of the eye (exotropia), and vertical misalignments (hyper/hypotropia). Ocular media opacities include corneal, lenticular and vitreous opacities, including cataracts, and opacities that could indicate other ocular problems such as congenital glaucoma. The OSS-C does not normally detect against-the-rule astigmatism, diseases affecting the retina and optic nerve (unless they produce visibly abnormal reflexes), glaucoma, or color blindness.

Important Early Screening is Now Possible

There are a number of eye problems in the 6-and-under age group that are easily corrected if they are detected early enough. In some cases, "early enough" can be before age 2; in other cases, it may range up to age 5 or 6. Amblyopia (commonly called "lazy eye") occurs in 2% to 4% of all children and can cause permanent vision impairment if not corrected at an early age. Factors that can indicate or lead to amblyopia include high or unequal refractive errors, alignment errors and opacities. The OSS-C is ideal for screening these young ages.

Years of Development, Testing and Field Use

The OSS-C is the product of years of development, testing, and refinement, with tens of thousands of in-clinic and in-field screenings preceding its market introduction. The result is an in-clinic screening device that is sensitive, accurate, and affordable by almost any clinic or healthcare office.