Methods to measure error of refraction are all except-
The final step in the subjective refraction is binocular balancing--a process sometimes known as 'equalizing the accommodative effo' or 'equalization of vision'. This allows both eyes to have the retinal image simultaneously in focus. Reference : A K KHURANA OPHTALMOLOGY, Edition4 ,Page-557
Retinoscopy
Refractometry
Keratometry
Binocular balancing
Optics and refraction