This article is more than 5 years old. Information may no longer be current.

Cataract TyPE Specification questionnaire, subscales 'good measures' of cataract patients' vision

J Cataract Refract Surg. 2009;35(9):1509-1517.

Add topic to email alerts

Receive an email when new articles are posted on

Please provide your email address to receive an email when new articles are posted on .

Subscribe

Added to email alerts

You've successfully added to your alerts. You will receive an email when new content is published.

Click Here to Manage Email Alerts

You've successfully added to your alerts. You will receive an email when new content is published.

Click Here to Manage Email Alerts

Back to Healio

We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com.

Back to Healio

A questionnaire was an adequate measurement of vision in cataract patients when reviewed with Rasch analysis, a study found.

The study examined the 12-item Cataract TyPE Specification questionnaire, which was self-administered to 294 patients on a cataract surgery waiting list at Flinders Medical Centre, Adelaide, Australia. The Rasch model was used to determine if the questionnaire and its five subscales' fit validity measurements.

A shorter 11-item questionnaire was also administered to determine connection to a "global rating of vision" question.

"With minor modifications, the Cataract TyPE Spec questionnaire and its glare and near-vision subscales were good measures of visual functioning in the cataract patient," the study authors said.

Removing one item, about nighttime driving, improved the model's fit. Reliability for person-separation was high, at 0.90.

"The principal components analysis of the residuals demonstrated unidimensionality for the 11-item Cataract TyPE Spec and two subscales. However, items were targeted to a less able population. Only two subscales (near vision and glare) were valid," they said.