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:: Volume 20, Issue 1 (Iranian Journal of Ophthalmology 2008) ::
2008, 20(1): 32-36 Back to browse issues page
Alteration of Tear Film after Vitrectomy and its Influencing Factors
Touka Banaee Dr. *, Hamid Gharaee Dr., Mohammad KhajehDaluee Dr., Saeed Shokoohi-Rad Dr., Majid Abrishami Dr.
, tk_banaee@yahoo.com
Abstract:   (17083 Views)

Purpose: To detect the prevalence of dry eye after vitrectomy and its influencing factors.

Methods: Schirmer I, Tear Basic Secretion Test and Tear Breakup Time was done preoperatively and 3 months postoperatively on consecutive patients undergoing vitrectomy in Khatam Hospital from 2005 to 2006. Eyes with previous peritomies of more than 120and symptoms of dry eye or tear tests compatible with a diagnosis of dry eye were excluded. Intraoperative factors including the extent of peritomy, extent of inadvertent conjunctival lacerations, extent of scleral depression and the instrument used for scleral depression were recorded. Scleral depression was graded extensive if it was done for more than 180 of globe circumference.

Results: Seventy five eyes of 75 patients were studied. Forty six (61.3%) of patients were male. The mean age of the patients was 47.13±18.85 years. Peritomy size was on average 179.33◦±124.75 and the mean size of conjunctival ruptures was 2.18± 4.33 mm . Based on the type of instrument used for scleral depression, patients were divided into 4 groups: 1) metallic instrument, 6 cases (8%) 2) cotton applicator, 32 cases (42.7%) 3) both, 14 cases (18.8%) 4) none (no scleral depression), 23 cases (30.7%). Of 52 cases with scleral depression, the depression was extensive in 35 cases (46.7% of all eyes). Thirteen eyes (17.3%) developed tear film parameters or symptoms consistent with dry eye. All of these eyes had undergone extensive scleral depression. Cotton applicator had been used significantly more in cases which developed dry eye. There was a direct relation between extent of peritomy and inadvertent conjunctival laceration and development of dry eye.

Conclusion: Due to damage to the conjunctiva during operation, vitrectomy is apt to cause dry eye. To lower the risk of this complication, scleral depression, peritomy and possibility of inadvertent conjunctival lacerations should be minimized. It is also better to use metallic instruments for scleral depression rather than cotton applicator.


Iranian Journal of Ophthalmology 200820(1):32-36
Keywords: vitrectomy, dry eye, complication, scleral depression, peritomy
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Type of Study: Original | Subject: General
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Banaee T, Gharaee H, KhajehDaluee M, Shokoohi-Rad S, Abrishami M. Alteration of Tear Film after Vitrectomy and its Influencing Factors. Iranian Journal of Ophthalmology. 2008; 20 (1) :32-36
URL: http://irjo.org/article-1-112-en.html

Volume 20, Issue 1 (Iranian Journal of Ophthalmology 2008) Back to browse issues page
مجله چشم پزشکی ایران Iranian Journal of Ophthalmology
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