Pramāṇam the word means, “means of knowledge”. Pratyakṣam is direct knowledge – indriya viṣaya sannikarṣa jñānam – the knowledge gained when objects come into contact with the five sense organs, viz., sight, hearing smell, taste and touch. The sequence in which the senses are listed is meaningful and relevant, as it goes from gross to subtle. Eyes can see hundreds of meters; ears can hear within tens of meters; nose can smell upto a few meters; taste and touch have to be immediate and intimate.
In knowing, the means and the knowledge, there is no option –one has no choice over what one sees, the moment one open’s one’s eyes.