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Table 2 Comparison of optical quality parameters (OSI, MTF cut-off and Strehl ratio) and OSDI scores between and within the two groups after surgery

From: Evaluation of optical quality in pterygium patients with a new modified sutureless and glue-free method

Optical quality   Presurgery Postsurgery (1 mo) Postsurgery (3 mo) P-Value
OSI (OSI value) Group1 4.88 + 3.18 2.16 ± 1.56 1.64 ± 1.52 p1 = 0.00
p2 = 0.00
p3 = 0.00
Group2 6.22 + 4.41 3.42 ± 1.87 2.58 ± 1.43 p1 = 0.00
p2 = 0.00
p3 = 0.00
P-value 0.346 0.005 0.004  
MTF cut-off (c/deg) Group1 16.52 + 9.23 29.71 ± 12.03 37.94 ± 9.94 p1 = 0.00
p2 = 0.00
p3 = 0.00
Group2 13.81 + 10.38 23.16 ± 9.00 33.36 ± 8.31 p1 = 0.00
p2 = 0.00
p3 = 0.00
P-value 0.227 0.042 0.039  
Strehl ratio Group1 0.12 + 0.04 0.19 ± 0.04 0.23 ± 0.05 p1 = 0.00
p2 = 0.00
p3 = 0.00
Group2 0.11 + 0.03 0.14 ± 0.04 0.18 ± 0.08 p1 = 0.00
p2 = 0.00
p3 = 0.00
P-value 0.313 < 0.001 < 0.001  
OSDI Group1 21.74 + 13.67 10.33 ± 6.23 4.94 ± 3.70 p1 = 0.00
p2 = 0.00
p3 = 0.00
Group2 22.41 + 10.68 13.88 ± 5.84 6.02 ± 3.14 p1 = 0.00
p2 = 0.00
p3 = 0.00
P-value 0.49 0.037 0.13  
  1. p1 Pre vs 1mo, p2 1mo vs 3mo, p3 pre vs 3mo within group