| North | Central | LVT | Alentejo | Algarve |
---|---|---|---|---|---|
Screening method - colour fundus photography | Yes | Yes | Yes | Yes | Yes |
Electronic transfer of images | Yes | Yes | Yes | Yes | Yes |
Retinografers location | Portable | Portable s | Non-portable - ACES | U | Hospital |
Pupil dilatation | No | No | No | No | No |
Calls to the target population through postal invitations | Yes | Yes | Yes | Yes | Yes |
Who performs the photography | Orthoptic technicians provided by hospitals | Orthoptic technicians provided by hospitals | Primary Health Centres orthoptists | U | Hospital Orthoptic technicians |
Software for automatic readings | No | Yes | Yes | No | No |
Camara Device | Non-mydriatic camera, CR-2 Digital Retinal Camera (Canon) | Nonmydriatic cameras – Canon CR6-45NM with a Sony DXC-950P 3CCD colour video camera | Non-mydriatic camera, CR-2 Digital Retinal Camera (Canon) | U | U |
Screening test procedure | Retinography of both retinal fields, both with 45° field, one focusing on the macula and the other on the optic nerve | Retinography of both retinal fields, both with 45° field, one focusing on the macula and the other on the optic nerve. When impossible to obtain an image with minimum quality is performed an iatrogenic pupil dilation with a topical mydriatic. | Retinography of both retinal fields, both with 45° field, one focusing on the macula and the other on the optic nerve | U | U |