Zhao PY, Rahmathullah R, Stagg BC, et al. A Worldwide Price Comparison of Glaucoma Medications, Laser Trabeculoplasty, and Trabeculectomy Surgery.
Sheffield V (contributor), Chapter 56, Evans, PY "Ophthalmic Assisting in the international community and in the prevention of blindness"
Community Eye Health Journal, Vol. 30, Number 98, International Centre for Eye Health, London School of Hygiene & Tropical Medicine, 2017
Sheffield V, Reddy PA, “Lessons from the USAID Child Blindness Programme”
Community Eye Health Journal, Vol. 26, Issue 83, International Centre for Eye Health, London School of Hygiene and Tropical Medicine, Dec. 2013
Rahmathullah R, Barrows J, Sheffield V, “How fixed fees and patient choice can support eye care for the poorest”