Ibn Abbas

ʿAbd Allāh ibn ʿAbbās (Arabic: عَبْد ٱللَّٰه ٱبْن عَبَّاس; c. 619 – 687 CE), also known as Ibn ʿAbbās, was one of the cousins of the Islamic prophet Muhammad. He is considered to be the greatest mufassir of the Qur'an.He was the son of Abbas ibn Abd al-Muttalib, an uncle of Muhammad, and a nephew of Maymunah bint al-Harith, who later became Muhammad's wife.

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Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 years ago

Abdullah ibn Abbas was not well during that time. It is narrated that he suffered a lot from his eyes and lost his eye sight as you read in Al-Bidayah Wal-Nihayah by Ibn Katheer , Volume 8, page 335.
Quran states (There is no burden on the blind ليس على الآعمى حرج 

Wassalam.