The sense-organ of sight (eyes)- That sense organ, by means of which the Jīva (soul) apprehends colour and form (of the visible material substance);
it is available to soul due to the Kṣayopaśama (annihilation-cum-subsidence) of the Vīryāntarāya [Karma, obstructing the spiritual energy) and specific (i.e. ocular) sense-organ-veiling Karma, and also the Udaya (rise) of the Angopānga Nāma Karma (which is a sub-type of the body-making Karma responsible for the availibility of the primary and secondary organs of the body).
vīryāntarāyapratiniyatendriyāvaranaksayopaśamāngopānganāmalābhāvastambhāt... pasyatyanenātrneti caksuh.
(TaVā 2.19)