Lüchtenberg M, Hoppe T, Ohrloff C, Meyer C H, Schalnus R
Klinik für Augenheilkunde, Klinikum der Johann-Wolfgang-Goethe-Universität, Frankfurt/Main.
Klin Monbl Augenheilkd. 2008 Dec;225(12):1075-83. doi: 10.1055/s-2008-1027636. Epub 2008 Dec 15.
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?
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.
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.
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.
通过互联网获取眼部健康信息的视障人士数量在持续增加。因此，视障人士对这类网站的可访问性是一个重要因素。我们的调查探讨了以下问题：视障人士在互联网上获取眼部疾病信息的可访问性如何，以及如何加以改善？
在使用搜索引擎“谷歌”进行识别后，我们使用基于52项测试标准的改良BITV测试，对德国大学眼科医院的20个网站的可访问性进行了检查。
平均而言，所需可访问性标准的70.75%（±6.19%，最小值56.6%，最大值86.79%）得到了满足。这对应于平均可访问性值为70.58%（±6.69%，最小值56.31%，最大值89.32%）。根据BITV测试，这意味着所分析网站的平均水平不可访问。标记语言使用不当、文档或网页标题不清晰、图片、图形和导航元素缺少替代文本以及导航架构误导等情况屡见不鲜。这些构成了最大的可访问性障碍，不过即使花费相对较低也能消除这些障碍。
良好的可访问性不仅能让视障用户无障碍地获取信息，也是与搜索引擎优化相关的一个最重要特征。
