J Korean Ophthalmol Soc.  2010 Mar;51(3):386-392.

Changes in Visual Field Index After Cataract Extraction

• Jeon S
• Choi JH
• Yang JW
• Lee YC
• Kim SY

Abstract

PURPOSE
To investigate the changes of visual field index (VFI) compared with mean deviation (MD) and pattern standard deviation (PSD) before and after cataract surgery.
METHODS
The present study included 77 eyes of 77 patients who were diagnosed with both glaucoma and cataracts and underwent cataract surgery. Preoperative and postoperative VFI, MD, and PSD were examined. Lens opacity type was classified as cortical, nucleosclerosis, or posterior subcapsular opacity (PSCO), and the MD, PSD, and VFI were compared before and after cataract surgery.
RESULTS
Preoperative and postoperative MD were -13.64+/-8.97, -11.94+/-9.67(p=0.113), PSD were 6.18+/-3.30, 5.91+/-3.31(p=0.344), and VFI were 67.00+/-33.43, 70.55+/-33.19(p=0.440), respectively. MD showed statistically significant difference in cortical and PSCO type before and after cataract surgery. PSD (p=0.025) and VFI (p=0.020) showed a statistically significant difference in cortical type.
CONCLUSIONS
VFI is an effective parameter to monitor the progression of glaucoma in cataract patients with nucleosclerosis and PSCO, but has limitations in cataract patients with cortical opacity.

Keyword

Cataract; Glaucoma; Visual Field Index

MeSH Terms

Cataract
Cataract Extraction
Eye
Glaucoma
Humans
Organothiophosphorus Compounds
Visual Fields
Organothiophosphorus Compounds

Figure

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  Figure 1. (A) 24–2 Visual field examination, 3 months before cataract surgery (MD=-6.52dB, PSD=9.09dB, VFI: 82%). (B) 24–2 Visual field examintion, 4 months after cataract surgery showing much better test results (MD= −5.07dB, PSD=4.45dB, VFI=91%).

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  Figure 2. Correlation between MD and VFI. MD and VFI showed positive correlation which is statistically significant (R2=0.96, p<0.005) (MD=mean deviation, VFI=visual field index).

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  Figure 3. Correlation between PSD and VFI. PSD and VFI showed negative correlation which is statistically significant (R2=0.341, p<0.005). (PSD=pattern standard deviation, VFI=visual field index).

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  Figure 4. Correlation between difference in visual acuity and difference in VFI. Improvement of postoperative visual acuity was not related to difference in VFI (R2=0.002, p=0.68). (BCVA=best corrected visual acuity, VFI=visual field index).

Reference

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