There is considerable unmet need for cataract treatment within the Northern Region and significant variation in the current meeting of needs and demands. It may be that more needs could be met simply by changing referral and treatment patterns without increasing total service activity. Although visual acuity is a reasonably objective measure in routine use, the level of visual handicap is more important, and its assessment is more subjective; development of a standard method to assess this could help in producing guidelines for patient referral and selection. Audit of treatment thresholds could allow a better matching of service provision to population needs.
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