ENGLISH ABSTRACT
JOURNAL ARTICLE
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[Accessibility of information on eye diseases on the internet for the visually impaired user].

BACKGROUND: The number of visually impaired people who use the internet for obtaining health information around the eye, is rising continuously. For this reason the accessibility for visually impaired persons to such websites is an important factor. Our investigation deals with the question: How good is the accessibility for the visually impaired to gather information on eye diseases on the Internet and how could this be improved?

MATERIALS AND METHOD: After identification using the the search engine "Google", 20 websites of German university eye hospitals have been checked for their accessibility using the modified BITV test which is based upon 52 test criteria.

RESULTS: On average 70.75 % (+/- 6.19 % min. 56.6 %, max; 86.79 %) of the required accessibility criteria have been fulfilled. This corresponds to an average accessibility value of 70.58 % (+/- 6.69 % min. 56.31 %, max. 89.32 %). According to the BITV test, this means that the average of the analysed websites is not accessible. The improper use of mark-up languages, unclear document or web page titles or missing alternative texts for pictures, graphics and navigation elements and misleading navigational architecture are frequent findings. This builds up the greatest accessibility barriers, although these barriers could be eliminated even with a relatively low expense.

CONCLUSION: Good accessibility allows not only a barrier-free access to information for visually impaired users but is also a most important feature related to search engine optimisation.

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