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Table 5 Spearman rank correlation analysis of the relationships among the iTrace optical metrics, OQAS optical metrics and BCDVA. (N = 104)

From: Comparatively analysing the postoperative optical performance of different intraocular lenses: a prospective observational study

 

Sample size

Starbursts b

 

Mixed focus b

Correlation coefficient

P

power

Correlation coefficient

P

power

 

BCDVA

104

0.427

< 0.001***

98.8%

 

-0.362

< 0.001***

96.4%

 

PVA 100% a

104

0.371

< 0.001***

96.1%

 

-0.366

< 0.001***

96.2%

 

PVA 20% a

104

0.328

< 0.001***

93.5%

 

-0.328

< 0.001***

83.8%

 

PVA 9% a

104

0.163

0.098

37.3%

 

-0.144

0.146

28.1%

 

SR a

104

-0.208

0.034*

51.1%

 

0.09

0.366

16.1%

 

OSI a

104

0.442

< 0.001***

99.0%

 

-0.342

< 0.001***

93.0%

 

MTF cut-off frequency a

104

-0.365

0.001***

95.5%

 

0.356

0.001***

95.4%

 
  1. a The OQAS optical metrics include PVA 100%, PVA 20%, PVA 9%, SR, OSI and MTF cutoff frequency
  2. b The iTrace optical metrics include blur/double vision, glare/halo, starburst, mixed focus, night myopia, and night hyperopia. Starburst and mixed focus were the only two iTrace optical metrics that exhibited statistical correlation with the OQAS optical metrics and BCDVA
  3. BCDVA = best corrected distance visual acuity; PVA 100% = predicted visual acuity at contrast of 100%; PVA 20% = predicted visual acuity at contrast of 20%; PVA 9% = predicted visual acuity at contrast of 9%; SR = strehl ratio; MTF = Modulation transfer function; OSI = objective scattering index
  4. *P < 0.05, **P ≤ 0.01; ***P ≤ 0.001
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BMC Ophthalmology

ISSN: 1471-2415

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