Journal List > J Korean Ophthalmol Soc > v.56(11) > 1010145

Shin, Jeong, Kim, Lee, Hong, Kim, Seong, and Park: Thickness in Ganglion Cell-Inner Plexiform Layer on Spectral-Domain Optical Coherence Tomography after Cataract Surgery

Abstract

Purpose

To assess changes in ganglion cell-inner plexiform layer (GCIPL) thickness after cataract surgery using spectral-do-main optical coherence tomography (OCT).

Methods

Forty-three eyes of 33 patients, who underwent cataract surgery were imaged with spectral-domain OCT before and after surgery to measure peripapillary retinal nerve fiber layer (RNFL) and GCIPL thickness, signal strength (SS), quadrant, 12 clock-hour RNFL thickness and sectoral GCIPL thickness.

Results

The postoperative SS, RNFL and GCIPL thickness were higher than before surgery ( p < 0.05). Multivariate analysis showed that endothelial cell count and preoperative SS were significantly correlated with SS changes in RNFL parameters and preoperative SS was significantly correlated with SS changes in GCIPL parameters. Univariate analysis indicated that age was significantly correlated with RNFL thickness changes in RNFL parameters and no factor was correlated with GCIPL thickness in GCIPL parameters ( p < 0.05).

Conclusions

Cataracts may decrease peripapillary RNFL and GCIPL thickness measurements and SS on OCT scans. Peripapillary RNFL and GCIPL thickness measurements should be interpreted with caution in eyes with significant cataracts.

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Figure 1.
Changes of RNFL and GCIPL thickness before (A, C) and after (B, D) cataract surgery in the left eye of a 69-year-old man. Signal strength, quadrant, 12 clock-hour, average RNFL thickness, sectoral, aver-age, minimum GCIPL thickness were higher than before surgery. Color codes of 9, 11 clock-hour RNFL thickness were changed after surgery. RNFL = retinal nerve fiber layer; GCIPL = ganglion cell-inner plexiform layer; S = superior; N = nasal; I = inferior; T = temporal; OS = oculus sinister; GCL = gan-glion cell layer; IPL = inner plexiform layer.
jkos-56-1767f1.tif
Table 1.
Clinical characteristics of patients
Characteristics Data
Numbers (eyes:patients) 43:33
Age (years) 67.19 ± 6.95
Gender (male:female) 16:17
Eye (right:left:both) 10:13:10
SE (Diopter), preoperative -0.30 ± 2.18
BCVA (log MAR), preoperative 0.25 ± 0.16
IOP (mm Hg), preoperative 14.28 ± 2.75
Types of lens opacities (cortical:nuclear:posterior) 26:12:5
Axial length (mm) 23.75 ± 1.04
Endothelial cell count (cells/mm2) 2,764.14 ± 335.18
Follow up (days) 59.19 ± 24.13

Values are presented as mean ± SD unless otherwise indicated. SE = spherical equivalent; BCVA = best corrected visual acuity; IOP = intraocular pressure.

Table 2.
Comparison of RNFL parameter between preoperative, postoperative data measured
Parameter Preoperative Postoperative Difference p-value*
Signal strength 4.93 ± 1.23 5.99 ± 0.79 1.06 ± 1.22 <0.001
RNFL (μ m)
Superior 109.00 ± 17.58 118.72 ± 18.15 9.72 ± 9.10 <0.001
Nasal 62.72 ± 12.11 67.50 ± 9.27 7.07 ± 9.16 <0.001
Inferior 111.62 ± 18.24 122.81 ± 19.20 11.20 ± 8.20 <0.001
Temporal 64.80 ± 10.66 73.70 ± 13.52 6.61 ± 7.85 0.005
Clock hour
1 95.08 ± 23.07 102.43 ± 22.14 9.87 ± 9.84 <0.001
2 73.12 ± 13.88 78.86 ± 13.14 8.02 ± 6.80 <0.001
3 54.30 ± 11.91 60.77 ± 10.40 6.67 ± 6.52 <0.001
4 58.47 ± 11.03 62.86 ± 11.06 7.35 ± 6.54 <0.001
5 85.35 ± 15.67 94.19 ± 18.50 12.22 ± 11.08 <0.001
6 121.72 ± 25.82 130.50 ± 26.87 8.78 ± 13.86 <0.001
7 129.72 ± 22.59 142.05 ± 26.31 8.94 ± 9.61 <0.001
8 67.09 ± 15.98 75.40 ± 19.30 5.35 ± 14.09 <0.001
9 51.76 ± 7.35 60.71 ± 12.13 8.74 ± 7.82 <0.001
10 73.50 ± 11.35 84.37 ± 15.57 8.59 ± 9.87 <0.001
11 114.00 ± 22.14 126.76 ± 24.17 10.23 ± 12.98 <0.001
12 116.76 ± 23.47 125.81 ± 24.42 9.06 ± 13.95 <0.001
Average 87.48 ± 10.37 95.52 ± 11.85 8.05 ± 7.06 <0.001

Values are presented as mean ± SD unless otherwise indicated.

RNFL = retinal nerve fiber layer.

p-value was calculated by paired t-test.

Table 3.
Comparison of GCIPL parameter between preoperative, postoperative data measured *
Parameter Preoperative Postoperative Difference p-value*
Signal strength 5.67 ± 1.23 6.76 ± 0.95 1.08 ± 1.30 <0.001
Average thickness (μ m) 79.37 ± 6.26 84.90 ± 7.92 5.52 ± 3.92 <0.001
Superotemporal thickness (μ m) 80.21 ± 6.35 86.65 ± 7.62 7.77 ± 11.25 <0.001
Superior thickness (μ m) 80.54 ± 6.76 85.88 ± 7.71 5.35 ± 2.79 <0.001
Superonasal thickness (μ m) 79.28 ± 11.05 86.01 ± 10.91 5.41 ± 5.77 0.001
Inferonasal thickness (μ m) 77.34 ± 7.19 83.35 ± 12.86 5.70 ± 9.79 <0.001
Inferior thickness (μ m) 76.47 ± 8.79 82.35 ± 7.31 5.88 ± 6.21 <0.001
Inferotemporal thickness (μ m) 80.09 ± 7.52 86.19 ± 8.68 6.41 ± 6.17 <0.001

Values are presented as mean ± SD unless otherwise indicated.

GCIPL = ganglion cell-inner plexiform layer.

* p-value was calculated by paired t-test.

Table 4.
Factors associated with SS changes in RNFL parameter
Variables Regression coefficient p-value*
Age (years) 0.10 0.51
LOCS score 0.11 0.50
Endothelial cell count (cells/mm2) -0.32 0.03
Axial length (mm) -0.06 0.73
BCVA (log MAR), preoperative 0.36 0.02
IOP (mm Hg), preoperative -0.31 0.04
SE (Diopter), preoperative -0.14 0.37
SS, preoperative -0.79 <0.001

SS = signal strength; RNFL = retinal nerve fiber layer; LOCS = lens opacification classification system; BCVA = best corrected visual acuity; IOP = intraocular pressure; SE = spherical equivalent.

* p-value was calculated by univariate analysis.

Table 5.
Factors associated with SS changes in GCIPL parameter
Variables Regression coefficient p-value*
Age (years) -0.11 0.49
LOCS score 0.14 0.37
Endothelial cell count (cells/mm2) -0.30 0.047
Axial length (mm) -0.09 0.56
BCVA (log MAR), preoperative 0.43 0.004
IOP (mm Hg), preoperative -0.33 0.03
SE (Diopter), preoperative -0.01 0.94
SS, preoperative -0.72 <0.001

SS = signal strength; GCIPL = ganglion cell-inner plexiform layer; LOCS = lens opacification classification system; BCVA = best corrected visual acuity; IOP = intraocular pressure; SE = spherical equivalent.

* p-value was calculated by univariate analysis.

Table 6.
Factors associated with average RNFL thickness changes in RNFL parameter
Variables Regression coefficient p-value*
Age (years) -0.39 0.01
LOCS score 0.02 0.92
Endothelial cell count (cells/mm2) -0.03 0.85
Axial length (mm) 0.25 0.11
BCVA (log MAR), preoperative 0.04 0.81
IOP (mm Hg), preoperative 0.01 0.95
SE (Diopter), preoperative -0.04 0.79
SS, preoperative 0.06 0.72

RNFL = retinal nerve fiber layer; LOCS = lens opacification classification system; BCVA = best corrected visual acuity; IOP = intraocular pressure; SE = spherical equivalent; SS = signal strength.

* p-value was calculated by univariate analysis

Table 7.
Factors associated with average GCIPL thickness changes in GCIPL parameter
Variables Regression coefficient p-value*
Age (years) -0.25 0.11
LOCS score -0.02 0.89
Endothelial cell count (cells/mm2) -0.06 0.71
Axial length (mm) -0.07 0.65
BCVA (log MAR), preoperative -0.08 0.62
IOP (mm Hg), preoperative 0.08 0.61
SE (Diopter), preoperative 0.25 0.10
SS, preoperative 0.12 0.45

GCIPL = ganglion cell-inner plexiform layer; LOCS = lens opacification classification system; BCVA = best corrected visual acuity; IOP = intraocular pressure; SE = spherical equivalent; SS = signal strength.

* p-value was calculated by univariate analysis.

Table 8.
Factors associated with SS changes
Variables In RNFL parameter
In GCIPL parameter
Regression coefficient p-value* Regression coefficient p-value*
Endothelial cell count (cells/mm2) -0.32 0.03 -0.30 0.27
BCVA (log MAR), preoperative 0.34 0.71 0.37 0.37
IOP (mm Hg), preoperative -0.31 0.61 -0.32 0.56
SS, preoperative -0.79 <0.001 -0.72 <0.001

SS = signal strength; RNFL = retinal nerve fiber layer; GCIPL = ganglion cell-inner plexiform layer; BCVA = best corrected visual acuity; IOP = intraocular pressure.

* p-value was calculated by multivariate analysis.

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