Table 4 Explanations of the measured parameters.

∆S_R(5)

Subtracting the 5th min S_R values with the 0th min S_R values

∆S_R(10)

Subtracting the 10th min S_R values with the 0th min S_R values

∆S_R(15)

Subtracting the 15th min S_R values with the 0th min S_R values

∆S_R(20)

Subtracting the 20th min S_R values with the 0th min S_R values

∆S_R(25)

Subtracting the 25th min S_R values with the 0th min S_R values

∆S_R(35)

Subtracting the 35th min S_R values with the 0th min S_R values

∆S_R(45)

Subtracting the 45th min S_R values with the 0th min S_R values

∆MTF(5)

Subtracting the 5th min MTF values with the 0th min MTF values

∆MTF(10)

Subtracting the 10th min MTF values with the 0th min MTF values

∆MTF(15)

Subtracting the 15th min MTF values with the 0th min MTF values

∆MTF(20)

Subtracting the 20th min MTF values with the 0th min MTF values

∆MTF(25)

Subtracting the 25th min MTF values with the 0th min MTF values

∆MTF(35)

Subtracting the 35th min MTF values with the 0th min MTF values

∆MTF(45)

Subtracting the 45th min MTF values with the 0th min MTF values