Article

Long-Term Effects of Cataract Surgery on Tear Film Parameters

Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami, 900 NW 17th Street, Miami, FL 33136, USA.
The Scientific World Journal (Impact Factor: 1.73). 01/2013; 2013(2):643764. DOI: 10.1155/2013/643764
Source: PubMed

ABSTRACT

Purpose:
To examine the differences in tear film parameters more than 3 months postsurgery in eyes with cataract surgery (surgical eyes) versus eyes without cataract surgery (nonsurgical eyes).

Methods:
29 patients were seen at the Miami Veterans Affairs Medical Center (VAMC) who had cataract surgery by phacoemulsification in one eye more than 3 months prior to the study date and had no history of surgical intervention in their fellow eye. Tear film parameters were measured in both eyes and compared using McNemar tests for dichotomous variables and paired and single sample t-tests for continuous variables.

Results:
Mean patient age was 73 (standard deviation (SD): 11); 26 patients (90%) identified themselves as White and 7 (24%) as Hispanic. The mean number of days between surgery and this study was 952 (SD: 1109). There were no statistical differences between the surgical eye and the nonsurgical eye with respect to any of the measured tear film parameters. Confidence intervals around these differences were narrow enough to exclude a substantial effect of cataract surgery. The elapsed time between cataract surgery and measurement of the tear parameters did not appear to affect the difference in parameters between the two eyes.

Conclusion:
We found that eyes that had cataract surgery more than 3 months prior to testing had no differences in their tear film parameters compared to eyes without a history of surgery.

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Available from: Hermes Florez, Jul 16, 2014
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    ABSTRACT: AIM: To investigate the long-term effect of different incisions on the tear film after phacoemulsification. METHODS: Sixty-four patients (76 eyes) without dry eyes were selected and received phacoemulsification. The patients were divided into two groups randomly. Group A 30 patients (38 eyes) was performed with a 2.5 mm mini-incision coaxial phacoemulsification and group B 34 patients (38 eyes) was performed with a sub 1.8mm micro-incision cataract surgery (MICS). Schirmer I test (SIt), tear break-up time (BUT), corneal fluorescein staining (CFS) and tear osmolarity were observed at 3d preoperatively and 1wk, 1, 3, 6 mo and 1a postoperatively. The results were analyzed using a chi-square test and t-test with SPSS 19.0. RESULTS: (1) Schirmer I test (SIt): there was a significant increase in SIt at 1wk postoperatively. The difference between group A and group B was significant (P<0.01) at 1 wk postoperatively, but it was insignificant at other postoperative time points (P>0.05). (2) Tear break-up time (BUT): there was a large reduction in BUT at 1 wk, 1, 3 mo postoperatively. The difference between group A and group B was significant (P<0.05). However, there were no significant differences between the two groups at other times (P>0.05). (3) CFS score: there was a large increase in CFS at 1 wk, 1, 3 mo postoperatively. The difference between group A and group B was significant (P<0.05). However, there were no significant differences between the two groups at other times (P>0.05). (4) Tear osmolarity: there was a large increase in tear osmolarity at 1wk, 1mo postoperatively. The difference between group A and group B was significant (P<0.01). However, there were no significant differences between the two groups at other times (P>0.05). CONCLUSION: The stability of tear film in patients underwent sub 1.8 mm micro-incision cataract surgery(MICS) is much better than in patients received 2.5 mm mini-incision coaxial phacoemulsification, but symptomys of dry eye in patients operated with MICS are much more serious during the early postoperative period. There is no significant difference in the long-term effects on tear film between the two types of incision.
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