Adarsana refers to the real non-seeing of objects which already exist; it refers to the ignorance of factual existence of things. This term figures prominently in the Yoga school of thought, and in Jain philosophy.
Adarsana or adarshan in Sanskrit as an adjective means latent or invisible, and as a noun it means non-vision, disregard, non-appearance, neglect, latent condition disappearance, not-seeing. It also means agyan and avidya. Vaidyanath Shastri citing Sl. 2.25 and Sl. 3.55 of Vyasa Bhashya writes that by understanding the non-seeing of objects that exist one understands the seeing of those objects and comes to know about the reality of them. Darsana means seeing. Therefore, Panini, in his Ashtadhyayi (Sutra 1.1.60 and 61), has given its meaning as - disappearance, invisibility, elision of an object, which fact is denoted by luk, shlu and lup; lup refers to real non-seeing which already exists. In other words, Adarsana refers to the ignorance of factual existence of things. In Ayurveda, the term, adarsana, means visual errors and blindness that results in not seeing the objects that already exist. In the Puranas, Adarsana is the mind-born mother it is so said because the act of seeing and the act of not seeing or non-seeing is an activity of the mind.
The term, adarsana, as a technical term in Yoga referring to ignorance or absence of knowledge, figures prominently in the discussions pertaining to the Sadhanapada of Yoga Sutras of Patanjali. Patanjali systemised the Yoga philosophy or Yoga- darsana propounded by Acarya Hiranyagarbha which is the practical application of Samkhya principles earlier systemised through twenty two sutras by Kapila. Vyasa-bhasya which is Vyasa’s commentary on the Yoga Sutras of Patanjali has been commented upon by Vachaspati Misra and Vigyanabhikshu. Vyasa states that liberation consists precisely in the cessation of the mind which cessation occurs by the disappearance of the cause of misconception or adarsana while adding that correct vision of reality (darsana) stops or sublates misconception which is the cause of bondage. Vyasa explains that adarsana is the particular conjunction of avidya in relation to the inward individual consciousness. Vyasa in his commentary on Sadhanapada of Yoga Sutras elaborately discusses and explains the concept of adarsana. Therefore, Adarsana or wrong conception or contrary knowledge is that contact of the Purusa with the Gunas in which the Gunas serve as objects of Purusa. The modification of the mind in the shape of experience of pleasure and pain is adarsana. Adarsana ceases on attainment of discriminative knowledge that gradually leads to Kaivalya or liberation. It is also known as the power which manifests as knowing (darsana), or as the characteristic of both the knower (Purusa) and the knowable.