Complex sentence: More than three decades later, once the Internet and Wikipedia came into being, Claude A. R. Kagan provided the project with a valuable study into accessibility, when in his 80s, he suffered problems including age-related blindness.
Split into simpler sentences: More than three decades later, once the Internet and Wikipedia came into being, Claude A. R. Kagan provided the project with a valuable study into accessibility. When in his 80s, he suffered problems including age-related blindness.