Sāṃkhya Kārikā verse 7

atidūrāt sāmīpyāt-indriya-ghātāt-manas-anavasthānāt |
saukṣmyāt-vyavadhānāt-abhibhavāt samāna-abhihārāt-ca ||

atidūra - a great distance, very distantsāmīpya - neighbourhood, nearness, proximityindriya - faculty of sense; sense; organ of senseghāta - injuring, hurtingmanas - mind; that which objects of sense affectanavasthita - losing stability, unsettled, unsteady,sūkṣma - subtle; atomic; intangiblevyavahita - concealedabhibhava - disappearancesamāna - digestive air, middle breath; alike, similar, equalabhihāra - mingling togetherca - and

Commentaries and Reflections

Commentary by TKV Desikachar:

“In observing, we must remember a few more things:
When we are not able to see something,
It is either because something else is more obvious,
or because it is too close to us.”

Commentary by Paul Harvey:

(We may not perceive what is within the range of the senses (Pratyakṣa) because we are:)
Disinterested.
Overly interested.
Blind or deaf to what is in front of us.
Distracted.
Not relating with what is there.
Seeing something between.
Letting something else dominate.
Confusing with something similar.