Reduced visual acuity Moderately reduced visual acuity Moderate vision loss Moderate reduction in visual acuity Moderate visual impairment SNOMEDCT_US:397542006 UMLS:C1301510 Moderate reduction of the ability to see. On the 6m visual acuity scale, moderate reduction is defined as less than 6/18 but at least 6/60. On the 20ft visual acuity scale, moderate reduction is defined as less than 20/70 but at least 20/200. On the decimal visual acuity scale, moderate reduction is defined as less than 0.3 but at least 0.1. Moderate visual loss