Table 2.

Summary of the use of sub-Tenon’s block to the total number of regional ophthalmic blocks used for cataract surgery (percentage, year of national survey).

Country	Sub-Tenon’s block % (year of survey)
Canada	31% (2010) [84] 61% (2018) [84]
Japan	63% (1999) [85]
Korea	42% (2012) [86]
New Zealand	86% (2007) [87]
Singapore	5% (2004) [88] 7% (2016) [89]
United Kingdom	42% (2003) [79] 50.5% (2013) [56]
United States of America	5% (2003) [92]

Data should be interpreted with caution because of the inherent difficulty in getting a truly representative sample.