[1] Natl Univ Singapore, Saw Swee Hock Sch Publ Hlth, Singapore, Singapore
[2] Essilor Inc Corp, R&D AMERA, Vis Sci, Singapore, Singapore
[3] Wenzhou Med Coll, Sch Optometry & Ophthalmol, Wenzhou, Peoples R China
[4] Singapore Natl Eye Ctr, Singapore Eye Res Inst, Singapore, Singapore
[5] Natl Univ Hlth Syst, Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Ophthalmol, Singapore, Singapore
[6] Natl Univ Singapore, Duke NUS Grad Med Sch, Singapore, Singapore
[7] Tokyo Med & Dent Univ, Dept Ophthalmol & Visual Sci, Tokyo, Japan
[8] Columbia Univ Coll Phys & Surg, Edward S Harkness Eye Inst, Dept Ophthalmol, 630 W 168th St, New York, NY 10032 USA