Impacts of hearing or vision illnesses or disorders on lifespan development. does the stage of development significantly alter the impact of the disorder on quality of life?

Yes, the stage of development significantly alter the impact of the disorder on quality of life. Presbycusis is a growing problem that has been reported to reduce quality of life (QoL). The term “presbycusis” refers to hearing loss that is associated with the cochlear degenerative process of aging. 

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.