On the indriyas, see Karin Preisendanz's:

“On tmendriyamanorthasannikara and the Nyya-Vaieika Theory of Vision.” Berliner Indologische Studien 4/5 (1989), pp. 141-213 

and (use the index)

Studien zu Nyyastra III.1 mit dem Nyyatattvloka Vcaspati Miras II. Alt- und Neu- Indische Studien 46,1-2. Stuttgart: Franz Steiner Verlag 1994.
-- 
Alex Watson
Professor of Indian Philosophy
Head of Philosophy Department
Ashoka University