Bàba zuìjìn lǎohuā de lìhài, kàn shǒujī yào zhāi yǎnjìng.
Dad's presbyopia has gotten bad - he has to take off his glasses to read his phone.
Tips
usage
Full clinical term is 老花眼 or 老视. The related glasses are 老花镜 / 老花眼镜 (reading glasses). Don't confuse with 近视 (myopia) or 远视 (hyperopia from birth) - presbyopia specifically means age-related loss of near focus.