Factors Affecting Stereopsis After Pediatric Cataract Surgery

Jung Hyo Ahn; Wan Soo Kim; Soo Jung Lee

doi:10.3341/jkos.2008.49.3.493

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Ahn, Kim, and Lee: Factors Affecting Stereopsis After Pediatric Cataract Surgery

Original Article

J Korean Ophthalmol Soc 2008;49(3):493-498.

Published online: 7 September 2008

DOI: https://doi.org/10.3341/jkos.2008.49.3.493

Factors Affecting Stereopsis After Pediatric Cataract Surgery

Jung Hyo Ahn, M.D., Wan Soo Kim, M.D., Ph.D, Soo Jung Lee, M.D.

Department of Ophthalmology, Maryknoll Hospital, Pusan, Korea

Address reprint requests to Soo Jung Lee, M.D. Department of Ophthalmology, Maryknoll Hospital #4-12 Daechung-dong, Chung-gu, Pusan 600-730, Koea Tel: 82-51-461-2540, Fax: 82-51-462-3534, E-mail: kris9352@hanmail.net

Received 7 May 2007 Accepted 17 September 2007

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To evaluate factors influencing stereoacuity outcomes after pediatric cataract surgery.

Methods

We retrospectively reviewed 38 eyes of 22 patients who had undergone irrigation and aspiration of cataracts and primary posterior chamber intraocular lens implantation from February 1992 to July 2006. In all patients, stereoacuity was assessed with the Titmus stereo test. Patients were divided into two groups according to stereoacuity: group 1 (n=9) had a stereoacuity less than 100 sec/arc; group 2 (n=13) had a stereoacuity more than 100 sec/arc. Nine variables associated with stereoacuity were evaluated in each group.

Results

Postoperative strabismus was the strongest factor influencing the stereoacuity level. Good postoperative mean visual acuity was related with good stereoacuity. Though mean visual acuity in two children with exodeviation over 30PD was 0.7 and 0.8, their stereoacuity was 400 sec/arc. Showing little difference in the spherical equivalent between the eyes was also related to good stereoacuity.

Conclusions

Postoperative strabismus onset, postoperative mean visual acuity between the two eyes, and differences in the spherical equivalent were important factors influencing stereoacuity in patients after pediatric cataract surgery.

Keywords: Pediatric cataract surgery, Postoperative strabismus, Postoperative visual acuity, Spherical equivalent, Stereoacuity

References

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Figure 1.

Distribution of stereoacuity of all patients.

Figure 2.

Relationship between postoperative mean visual acuity between fellow eyes and stereopsis. Mean visual acuity in two children with exodeviation over 30PD was 0.7 and 0.8, respectively. But stereoacuity was lower than that of children without strabismus with the same level of mean visual acuity (red triangle).

Table 1.

Associations of laterality of cataract with stereoacuity

	Group I (≤100 sec/arc) n=9 (40.9%)	Group II (>100 sec/arc) n=13 (59.1%)
Bilateral cataract	2 (33.3%)	4 (66.7%)	P=0.196^*
Unilateral cataract	7 (43.8%)	9 (56.3%)

^* Chi-square test.

Table 2.

Associations of surgical methods with stereoacuity

	Group I (≤100 sec/arc) n=9 (40.9%)	Group II (>100 sec/arc) n=13 (59.1%)
Intact posterior capsule	0 (0%)	4 (100%)	P=0.110^*
Optic capture through PCCC^†	5 (41.7%)	7 (58.3%)
Anterior vitrectomy	4 (66.7%)	2 (33.3%)

^* Chi-square test

^† PCCC=Posterior curvilinear continuous capsulorhexis.

Table 3.

Associations of after cataract with stereoacuity

	Group I (≤100 sec/arc) n=9 (40.9%)	Group II (>100 sec/arc) n=13 (59.1%)
Presence of after cataract	2 (28.6%)	5 (71.4%)	P=0.421^*
Absence of after cataract	7 (46.7%)	8 (53.3%)

^* Chi-square test.

Table 4.

Associations of postoperative onset of strabismus with stereoacuity

	Group I (≤100 sec/arc) n=9 (40.9%)	Group II (>100 sec/arc) n=13 (59.1%)
Presence of strabismus (>10PD^†)	0 (0%)	5 (100%)	P=0.049^*
Absence of strabismus (≤10PD^†)	9 (52.9%)	8 (47.1%)

^* Chi-square test

^† PD=prism diopters.

Table 5.

Associations of sensory fusion with stereoacuity

	Group I (≤100 sec/arc) n=9 (40.9%)	Group II (>100 sec/arc) n=13 (59.1%)
Presence of fusion	9 (56.2%)	7 (43.8%)	P=0.017^*
Absence of fusion	0 (0%)	6 (100%)

^* Chi-square test.

Table 6.

Simple associations of visual acuity difference, mean visual acuity, spherical equivalent difference between fellow eyes, and age at surgery with stereoacuity

	Correlation Coefficient	P-Value^*
Visual acuity difference	0.116	0.608
Mean visual acuity	0.233	0.297
Spherical equivalent difference	0.423	0.042
Age at surgery	−0.02	0.929

^* Chi-square test.

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