| |||
| Placido Keratoskop; Placido Scheibe; Plazidoscheibe f; Keratoskop n; Placido-da-Costa-Scheibe f; Placidoscheibe f | |||
| Keratoskop nach Placido; Placido-Scheibe f | |||
|
Placido disk : 9 phrases in 3 subjects |
| Medical | 4 |
| Medical appliances | 2 |
| Optics branch of physics | 3 |