Quality of Care and Stakeholders' Perceptions of PEC Implementation in Singapore: A Mixed-Methods Study Protocol. - Yip, Wanfen; Pereira, Michelle Jessica; De Castro Molina, Joseph Antonio; Tan, Woan Shin; Teow, Kiok Liang; Yip Cherng Hui, Vivien; Yong Khet Yau, Vernon; Wong, Hon Tym; Lim, Tock Han; Heng, Bee Hoon (Ophthalmic Epidemiology, 2025)