Table 1. Comparison of seven portable vision screening instruments outlining the cost, amblyopia risk factor screened, and clinically useful characteristics.
| Company | Welch Allyn | Adaptica | Plusoptix | iScreen | Optec | Goquity | Rebion | |
| Instrument | Spot Vision Screener | 2WIN | S12C/R | 3000 | 5500P | GoCheck Kids# | Blinq | |
| Place of Manufacture | Skaneateles Falls, NY, USA | Padova, Italy | Nuremberg, Germany | Cordova, TN, USA | Chicago, IL, USA | Scottsdale, AZ, USA | Boston, MA, USA | |
| Cost (US$) | 6750-8436 | 5000-6850 | 5495-8898 | 5000 | 3545-4716 | 169* | 7495-8995 | |
| Amblyopia Risk Factors (ARFs) | Refractive Errors | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Strabismus | Yes | Yes | Yes | Yes | Yes | Yes | Yes | |
| Cataracts (media opacity) | No | No | Yes | Yes | No | No | No | |
| EMR friendly interface§ | No | No | Yes | No | No | Yes | No~ | |
| Battery Life (minutes)§ | 240 | 240 | 180/variable** | 480 | - | 360-480 | 360 | |
| PHI Transmission§ | No | Yes | No | Yes | No | Yes | Yes | |
| Remote analysis§ | No | No | No | Yes | No | Yes | No | |
| Weight (pounds)§ | 2.55 | 1.88 | 1.76-2.20 | 4.35 | 15.50 | 0.30-0.46 | 4.00 |
# Currently only on the iPhone, * only monthly finance available, § Clinically useful characteristics, ~ EMR (electronic medical record) interface is currently being developed, ** Based on the rechargeable AA battery used.
Spot Vision Screener (Welch Allyn, Skaneateles Falls, NY), 2WIN (Adaptica, Padova, Italy), the S12C/R Mobile Vision Screener autorefractor (Plusoptix, Nuremberg, Germany), the iScreen 3000 photo screener (iScreen Vision Inc, Cordova, TN), the OPTEC 5500 vision screener (Stereo Optical Co., Inc., Chicago, IL), the GoCheck Kids smartphone photo screening application (Goquity Mobile Health, Scottsdale, AZ) on the iPhone (Apple Inc, Cupertino, CA), and the Pediatric Vision Scanner or “blinq” (Rebion, Boston, MA).