The suggested benefits of ECSSs were as follows: (1) improved access (through prioritisation of patients to external support services); (2) increased speed of access to these services; (3) a suggestion of improved patient throughput within the clinic; (4) a greater awareness within the hospital of issues related to low vision patients; (5) users emphasised access to someone who could listen to them as well as providing information about the registration process or services available. Nevertheless, the evidence underpinning these propositions is largely anecdotal or based upon specific case studies. Quantitative data to enable statistical analysis were almost universally missing. Additionally, while some patients reported benefits of the ECSS, many did not have a clear understanding of different elements of the overall services (medical and social) they receive.
Conclusive evidence as to the impact of ECSSs would most likely require a prospective study which tracked patients through the various services.