Screening Device - Plusoptix S09 Camera System
The Plusoptix S09 Vision Photorefractor measures the eyes' refraction uninfluenced by medications. The measurement values are compared with adjustable referral criteria and a "Refer" or "Pass" is displayed as screening result. Children with a screening result of "Refer" are referred to an ophthalmologist for an assessment. The preventive eye examination is repeated annually for children with a "Pass" result, because eyes change with growth and new vision disorders can develop.
Refraction, pupil sizes and corneal reflexes are measured and compared to referral criteria automatically. Referral criteria are:
Anisometropia - compares refraction of both eyes
Astigmatism - checks corneal irregularities
Hyperopia - checks farsightedness
Myopia - checks nearsightedness
Corneal reflexes - checks symmetric eye alignment
Anisocoria - compares pupil sizes of both eyes
If readings are within limits, a "pass" screening result is displayed. If one or more readings are out of limits, a "refer" screening result is displayed. Ametropia, strabismus, and in rare cases, media opacities and other eye diseases are the most frequently occurring vision disorders during childhood. Ametropia, as well as corneal reflex symmetry indicating a possible strabismus, are easily measured with the plusoptiX S09. Media opacities are discernible on screen. The earlier vision disorders are detected and treated, the more successfully amblyopia can be prevented. Established visual acuity tests can only be carried out relatively late, when children can communicate. Beyond this, it is not possible to detect ametropia reliably with these tests. However, ametropias are the most frequent cause of amblyopia and can only be reliably diagnosed by a determination of refraction. The Plusoptix S09 simultaneously measures the refraction of both eyes (binocular) at one meter distance in a matter of seconds. To detect amblyogenic risk factors at an early stage, the first preventive eye examination with the Plusoptix S09 should be carried out before the first birthday. (From Plusoptix website)
The values for the referral criteria that are used by NM Lions screening groups were obtained from Dr. Todd A. Goldblum with the intent of minimizing false-positive screening results. Below is an example of a "referral" measurement report.
Refraction, pupil sizes and corneal reflexes are measured and compared to referral criteria automatically. Referral criteria are:
Anisometropia - compares refraction of both eyes
Astigmatism - checks corneal irregularities
Hyperopia - checks farsightedness
Myopia - checks nearsightedness
Corneal reflexes - checks symmetric eye alignment
Anisocoria - compares pupil sizes of both eyes
If readings are within limits, a "pass" screening result is displayed. If one or more readings are out of limits, a "refer" screening result is displayed. Ametropia, strabismus, and in rare cases, media opacities and other eye diseases are the most frequently occurring vision disorders during childhood. Ametropia, as well as corneal reflex symmetry indicating a possible strabismus, are easily measured with the plusoptiX S09. Media opacities are discernible on screen. The earlier vision disorders are detected and treated, the more successfully amblyopia can be prevented. Established visual acuity tests can only be carried out relatively late, when children can communicate. Beyond this, it is not possible to detect ametropia reliably with these tests. However, ametropias are the most frequent cause of amblyopia and can only be reliably diagnosed by a determination of refraction. The Plusoptix S09 simultaneously measures the refraction of both eyes (binocular) at one meter distance in a matter of seconds. To detect amblyogenic risk factors at an early stage, the first preventive eye examination with the Plusoptix S09 should be carried out before the first birthday. (From Plusoptix website)
The values for the referral criteria that are used by NM Lions screening groups were obtained from Dr. Todd A. Goldblum with the intent of minimizing false-positive screening results. Below is an example of a "referral" measurement report.
