Cikũ Mathenge is a Consultant Ophthalmologist and Medical Retina specialist. She is a Co- Founder and Director of Training and Research at the Rwanda International Institute of Ophthalmology (RIIO) in Kigali, Rwanda.

Cikũ Mathenge is a Consultant Ophthalmologist and Medical Retina specialist. She is a Co- Founder and Director of Training and Research at the Rwanda International Institute of Ophthalmology (RIIO) in Kigali, Rwanda. Cikũ obtained her medical and ophthalmology education at the University of Nairobi and later a Masters in Community Eye Health and PhD in retina diseases from the University of London.

She trained as a Medical Retina Fellow at the Retina Foundation in Chennai India. Cikũ is a Professor of Ophthalmology at University of Rwanda and currently serves on the Boards of Ophthalmology Foundation and The Fred Hollows Foundation and was a Member of the Board of Trustees of the International Council of Ophthalmology from 2013 to 2021. Ciku is currently the only African member of the Academia Ophthalmologica Internationalis and has over 90 publications in peer reviewed journals. She is also the Medical Advisor for Africa for Orbis international.

She has been on the Ophthalmology Power list of 100 most influential female ophthalmologists winner and in 2026 is in the Top 10 of the Ophthalmology Power List as the only female and only African. She has also been an IAPB Eye Health Hero and Vision Excellence Award. She is the first female President of the African Ophthalmology Council. Ciku has served COECSA as Head of Education in the past and currently heads the Training if Trainers Sub Committee.