Later, he worked in Africa, where many people suffered from blindness for lack of proper treatment.

后来，他在非洲工作，那里有许多人因为缺乏适当的治疗而失明。

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In the developed world cataracts hardly ever cause blindness, and mostly elderly people are affected.

在发达国家，白内障很难造成永久性的失明，并且大多数只是老年人才受影响。

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People whose blindness results from a range of causes, including retinitis pigmentos and macular degeneration could benefit from it.

由于各种原因失明的人，比如，色盲症和视力退化症的患者都能从中获益。

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The venom can kill dogs and cats. It can also cause temporary blindness and excruciating pain in people if the poison gets into the eyes or mouth.

VOA: standard.2010.02.07

In March 2013, the Argus 2 was approved by the FDA for use in the United States and has the capacity to restore functional vision from people suffering from blindness.

FORBES: Artificial Retina From A Photovoltaic Polymer

Since red and green make brown, people with red-green blindness often have trouble telling the three colors apart.

WSJ: New Outlook for Colorblindness

Because of the observed benefits of treating river blindness, infected people agree to take the medication despite the side effects, Katabarwa said.

CNN: With river blindness, 'you never sleep'