The group's sophomore album features thirteen songs including the lead single, "I Can't Stop Me", and was released on the week of their fifth anniversary.

Production was handled by a wide array of producers including Melanie Fontana, Josh Record, LDN Noise, DJ Swivel, and Dua Lipa, with JYP Entertainment founder J. Y.

Following the release of Twice's commercially successful EP, More & More (2020), reports of an upcoming comeback by the group that would be set for October 26 had been circulating on various Korean media sites.

The song features a synthwave genre that mixes European electronic music and American 1980s synth sounds, while lyrically depicting the boundaries of the good and bad of intractable desires.

"Do What We Like" was penned by Sana, and is a retro-inspired dance track featuring electronic elements that details an aspiration to remember forgotten memories in a relationship.

"Believer" is a EDM-inspired self-encouragement song written by South Korean songwriter Kenzie of SM Entertainment and produced by LDN Noise.

[11][12] English singer-songwriter Dua Lipa participated in the composition of the thirteenth track of the album, "Behind the Mask", along with South Korean singer Heize, who took hand in the songwriting.

[14] On October 17, 2020, JYP Entertainment announced in an official statement that member Jeongyeon would take a hiatus due to "psychological anxiousness", and as a result would not participate in any of the promotional activities for Eyes Wide Open.

Twice also performed the album's lead single on their United States television debut on November 30, with their appearance on the "#PlayAtHome" series of The Late Show with Stephen Colbert.

[23] Writing for Beats Per Minute, Chase McMullen gave the album a score of 79/100, stating that it solidified "Twice's ever-surprising ability to evolve" and described the material as containing the group's "most sophisticated sound and presentation yet, seeing them grow beyond youthful exuberance to deliver pop with a bit more of a weathered, knowing edge".

Writer Kat Moon further praised Twice, stating that "even as they sing about inner turmoil, the words are expressed through sweet-toned voices and upbeat tunes—giving the listener a reassuring, revitalizing hug.

"[29] Tamar Herman of the South China Morning Post included Eyes Wide Open in her "Top 15 K-pop group albums of 2020", citing on the material's emphasis on Twice's dedication to "more mature, dramatic pop perfection as the nine women seamlessly glide between a medley of genres".

[31] Lai Frances of MTV News described the album as the "bigger, bolder sister of More & More" with the tracklist as being able to "take listeners on a sonic journey through space and time".