The method consists in a measurement of an alleged angular misalignment (referred to as associated phoria or hidden strabismus, also called "Winkelfehlsichtigkeit [de]" in German language) that is different from heterotropia or heterophoria, and involves the use of prisms for its correction.
It has found some application in German-speaking countries and claims to achieve unimpaired binocular vision,[2][3] however it has received little scientific recognition and is not accepted by mainstream medical practice, either internationally or in Germany.
[7] The German association of ophthalmologists (Berufsverband der Augenärzte Deutschlands [de] (BVA)) issued a statement warning that the use of the MKH method could in fact lead to use of prisms of increasing strength, ultimately requiring the patient to undergo strabismus surgery that would have otherwise been unnecessary.
[8] The vision therapy approach that is widespread in the U.S. and which has led to recover stereopsis in a number of persons, most notably Susan R. Barry, is diametrically opposed to the use of prisms in the manner that is advocated in the MKH method.
[10] Haase received the following awards:[11][12] The International Association for Binocular Vision (Internationale Vereinigung für Binokulares Sehen, IVBS) was created to further advance his MKH method.