1. Department of Applied Physics, Biomedical and X-Ray Physics, KTH Royal Institute of Technology, Stockholm, Swedensimon.winter@biox.kth.sewww.biox.kth.se
2. Department of Ophthalmology, University of Washington, Seattle, WA, USA
3. School of Optometry, University of California, Berkeley, CA, USA
4. Department of Applied Physics, Biomedical and X-Ray Physics, KTH Royal Institute of Technology, Stockholm, Sweden
5. School of Optometry, University of California, Berkeley, CA, USAVision Science Graduate Group, University of California, Berkeley, CA, USA