Love at First Sight (2016)

Both MLs are blind and withdrawn. Both FLs open up their world.
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Both have a wealthy, visually impaired ML with a domineering personality and an upbeat, poorer FL who brings him out of his shell after being hired as his helper.

Both dramas have a visually impaired ML and a FL who opens up his world.
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Both are different adaptations of the same story, one told in movie form, the other as a short length drama. The drama's FL is more mature and warmer, though.

Both involve the male lead being blind, and then gaining their eye sight. Both invoke the male lead having emotional baggage.

Both dramas involve the FL pretending to be someone she looks exactly alike (twin sister vs. a stranger), leading to a relationship between her and the ML. Both MLs are initially aggressive, powerful, and overbearing.