A Review of Capture-recapture Methods and Its Possibilities in Ophthalmology and Vision Sciences.

Epidemiological information is expected to be used to develop key aspects of eye care such as to control and minimise the impact of diseases, to allocate resources, to monitor public health actions, to determine the best treatment options and to forecast the consequence of diseases in populations. Epidemiological studies are expected to provide information about the prevalence and/or incidence of eye diseases or conditions. To determine prevalence is necessary to perform a cross-sectional screening of the population at risk to ascertain the number of cases.

Productivity Losses and Their Explanatory Factors Amongst People with Impaired Vision.

To estimate productivity losses amongst people with impaired vision in Portugal and to investigate explanatory factors associated with non-participation in the labour market. A total of 546 visually impaired individuals participated in face-to-face interviews. Participants were asked about their workforce participation to determine productivity (employment status questionnaire), their health-related quality of life - HRQoL (EQ-5D) and their visual acuity and visual ability (Activity Inventory).

The use of informal care by people with vision impairment.

Purpose: To estimate and characterize the use of informal care by people with vision impairment in Portugal.

Methods: A total of 546 visually impaired individuals were recruited from Portuguese hospitals. Clinical information was obtained from medical records, socio-demographic details and informal care use were collected during face-to-face interviews.