  A more detailed analysis of the measurement problem continues to support the
position taken by Shimony and the author that collapse of the wave function
takes place in an objective manner in the rhodopsin molecule of the retina.
This casts further doubts on the theories involving a spontaneous localization
collapse process or a no-collapse decoherence process taking place in the
visual cortex in a subjective fashion. The possibility is then raised, as per
Anandan, as to whether the solution of the measurement problem in quantum
theory allows one to address the problem of quantizing gravitation.
