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Table 2 Ophthalmic Examination Findings

From: Long-term visual pathway alterations after elemental mercury poisoning: report of a series of 29 cases

 

Patients

n = 29

Normal reference data

N (eyes)

29 (58)

BCVA Logmar (mean, SD)

0.048 (0.126)

0.0

[Snellen] (mean, SD)

[0.920 (0.205)]

[6/6]

CVS

13 (44.8%)

Color patterns

Normal

16 (55.2%)

Red-green defect

2 (6.8%)

Blue-yellow defect

9 (31.03%)

Mixed

1(3.44%)

Non-specific deficiency

1(3.44%)

CCI (mean, SD)

1.642 (1.183)

1.0

CSA

Eye (RE, LE)

RE

LE

CS3 mean (SD)

5.93 (1.22)

5.69 (1.16)

CS6 mean (SD)

5.62 (1.08)

5.69 (1.31)

CS12 mean (SD)

3.37 (1.01)

3.48 (0.91)

CS18 mean (SD)

3.34 (1.34)

3.41 (1.52)

VF

Eye (RE, LE)

RE

LE

MD mean (SD)

−5.64 (7.92)

−6.87 (8.52)

0.0

VFI mean (SD)

86.7 (21.2)

85.4 (21.4)

100%

Total, patients with alterations

21 (72.4%)

 

OCT

Eye (RE, LE)

RE

LE

 

CRT mean (SD)

249.4 (21,0)

248.1 (20,7)

233.6 (19.7)

RNFLT mean (SD),

102.2 (10.5)

100.2 (11.3)

100 (18)

  1. Data are presented as mean (SD) or as numbers. BCVA best-corrected visual acuity, RE right eye, LE left eye, CVS color vision scores, CCI color confusion index, CSA alterations in the achromatic contrast sensitivity, CS3 spatial frequency at 3 cycles/degree, CS6 spatial frequency at 6 cycles/degree, CS12 spatial frequency at 12 cycles/degree, CS18 spatial frequency at 18 cycles/degree, VF visual field test, MD mean deviation, VFI Visual Field Index, OCT optical coherence tomography, CRT central retinal thickness, RNFLT retinal nerve fiber layer thickness