Counselling, prescribing and instruction-effects of closed circuit television systems in rehabilitation of visually impaired adults

INTERVENTION: The intervention will consist of the newly developed standardised training program in the use of the CCTV for those persons who were counselled for this use in the three national Dutch rehabilitation centres. CONDITION: Eye conditions, Visual impairment ; Eye Diseases ; Visual impairment PRIMARY OUTCOME: The development of an optimal rehabilitation protocol for the instructions of the use of CCTVs for visually impaired adults. It will focus on several specific objectives: ; 1. To study the present process of counselling, prescribing and delivering a CCTV to visually impaired patients; 2. To develop a standardized method to instruct and train visually impaired patients in using a CCTV; 3. To study the effectiveness of this instruction and training program in the use of a CCTV; 4. To study the feasibility of this instruction and training program SECONDARY OUTCOME: 1. Reading speed (LEO test); 2. Understanding of texts (Aarnoutse test); 3. Activity inventory, frequency, nature and time of the use of a CCTV INCLUSION CRITERIA: 1. Visually impaired according to the Dutch guidelines 2. Acceptance of the conditions of the study (informed consent) 3. Above age of 18 years 4. Sufficient understanding of the Dutch language (Cito‐NT2 level higher than or equal to 3) 5. Competence to understand the questions of the questionnaires (adequate cognitive ability)