1. Biological Sciences Institute, Federal University of Para, Belém, Brazil
2. Department of Ophthalmology, University Hospital Erlangen, Erlangen, Germany
3. Tropical Medicine Nucleus, Federal University of Para, Belém, Brazil
4. givagosouza@ufpa.br
5. Institute of Psychology, University of São Paulo, São Paulo, Brazil
6. dventura@usp.br
7. Ceuma University, Sao Luis, Brazil
8. jan.kremers@uk-erlangen.dehttp://www.tierphys.nat.uni-erlangen.de/research/kremers//