Fig. 1
From: Knowledge about age-related eye diseases in the general population in Germany
Person-item map derived from a Rasch model describing all 16 items on the knowledge about common eye diseases in Germany. Items on cataract (C), glaucoma (G), age-related macular degeneration (A) and diabetic eye disease (D) follow the descriptions from Table 2. The # and. symbols reflect groups of 15 and < 15 test takers at a defined knowledge level, respectively