Rapid change of presbyopic glass is a feature of -

Difficulty in reading and close work ,often persistently increasing ,is experienced by most patients . This occur due to increasing accomodative failure as a result of constant pressure on the ciliary muscle and its nerve supply.Therefore,patients usually complain of , frequent changes in presbyopic glassesRef:Ophthalmology A K Khurana -6th edition chapter -10 page no:229