Methods to measure errors of refraction are all except
The final step in the subjective refraction is called "Binocular Balancing" - a process which is known as sometimes "Equalizing the accomodative effo" or "spherical equalization" This allows both eyes have the retinal image simultaneously in focus. Reference: AK khurana 7th edition
Retinoscopy
Refractometry
Keratometry
Binocular balancing
Optics and refraction