Journal List > J Korean Ophthalmol Soc > v.53(12) > 1009262

Kim, Yang, Lee, and Ahn: The Effect of Cataract Surgery on Ocular Pulse Amplitude

Abstract

Purpose

To investigate the change of intraocular pressure (IOP) and ocular pulse amplitude (OPA) measured by dynamic contour tonometry (DCT) after cataract surgery and to identify the influencing factors related with OPA change after cataract extraction.

Methods

The present study included 32 patients who underwent unilateral cataract surgery and the non-operated fellow eyes were used as control. IOP was measured by Goldman applanation tonometry (GAT) and Pascal DCT preoperatively, and 3 months postoperatively. Additionally, OPA was measured by Pascal DCT preoperatively, and 3 months postoperatively. Axial length (AL), anterior chamber depth (ACD), and central corneal thickness (CCT) were measured preoperatively.

Results

After cataract surgery, IOP by GAT, IOP by DCT, and OPA decreased significantly with a mean decrement of 1.3 mm Hg, 1.6 mm Hg, and 0.5 mm Hg, respectively (p < 0.05). OPA was significantly correlated with IOP by GAT (r = 0.497, p = 0.004) and IOP by DCT (r = 0.421, p = 0.016) preoperatively. OPA was correlated with GAT (r = 0.357, p = 0.045) but not with DCT (r = 0.224, p > 0.05) postoperatively. The most important factor influencing the decrement of IOP by GAT, IOP by DCT, and OPA after cataract surgery was the preoperative level of their measurements (r = 0.382, p < 0.05 in GAT, r = 0.807, p < 0.001 in DCT, r = 0.627, p < 0.001 in OPA). In addition, the OPA decrement after cataract surgery was significantly correlated with age (r = -0.370, p = 0.037), and was not correlated with AL, ACD, and CCT.

Conclusions

Both IOP and OPA decreased after cataract surgery, which appears to influence the relationship between IOP and OPA. The correlation between OPA decrement and age may be related to increased ocular rigidity with aging.

Figures and Tables

Figure 1
Factors affecting postoperative reduction of IOP and OPA. (A) Correlation between preoperative IOP measured by GAT and changes of IOP measured by GAT (dGAT = preoperative GAT - postoperative GAT). (B) Correlation between preoperative IOP measured by DCT and changes of IOP measured by DCT. (C) Correlation between preoperative OPA measured by DCT and changes of OPA measured by DCT. (D) Correlation between age of patients and changes of OPA measured by DCT.
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Table 1
Comparison of operated eyes and non-operated fellow eyes
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Values are presented as mean ± SD (range).

AL = axial length; ACD = anterior chamber depth; CCT = central corneal thickness; BCVA = best corrected visual acuity.

*Wilcoxon signed ranks test; Comparison between preoperative BCVA and postoperative BCVA within each group (Wilcoxon signed ranks test).

Table 2
Change of IOP and OPA measurements after cataract extraction
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Values are presented as mean ± SD.

*Wilcoxon signed ranks test, comparison of preoperative and postoperative measurements; Wilcoxon signed ranks test, comparison of operated eyes and non-operated fellow eyes.

Table 3
Factors affecting decrement of IOP and OPA at 3 months after cataract extraction
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Numeric data show Spearman rho (p-value).

AL = axial length; ACD = anterior chamber depth, CCT = central corneal thickness; dGAT = decreament of GAT · IOP after cataract operation; dDCT = decreament of DCT · IOP after cataract operation; dOPA = decreament of OPA after cataract operation.

*Statistically significant.

References

1. Tong JT, Miller KM. Intraocular pressure change after sutureless phacoemulsification and foldable posterior chamber lens implantation. J Cataract Refract Surg. 1998. 24:256–262.
2. Pohjalainen T, Vesti E, Uusitalo RJ, Laatikainen L. Intraocular pressure after phacoemulsification and intraocular lens implantation in nonglaucomatous eyes with and without exfoliation. J Cataract Refract Surg. 2001. 27:426–431.
3. Shingleton BJ, Pasternack JJ, Hung JW, O'Donoghue MW. Three and five year changes in intraocular pressures after clear corneal phacoemulsification in open angle glaucoma patients, glaucoma suspects, and normal patients. J Glaucoma. 2006. 15:494–498.
4. Falck A, Hautala N, Turunen N, Airaksinen PJ. A four-year prospective study on intraocular pressure in relation to phacoemulsification cataract surgery. Acta Ophthalmol. 2011. 89:614–616.
5. Shrivastava A, Singh K. The effect of cataract extraction on intraocular pressure. Curr Opin Ophthalmol. 2010. 21:118–122.
6. Issa SA, Pacheco J, Mahmood U, et al. A novel index for predicting intraocular pressure reduction following cataract surgery. Br J Ophthalmol. 2005. 89:543–546.
7. Shingleton BJ, Laul A, Nagao K, et al. Effect of phacoemulsification on intraocular pressure in eyes with pseudoexfoliation: single-surgeon series. J Cataract Refract Surg. 2008. 34:1834–1841.
8. Poley BJ, Lindstrom RL, Samuelson TW. Long-term effects of phacoemulsification with intraocular lens implantation in normotensive and ocular hypertensive eyes. J Cataract Refract Surg. 2008. 34:735–742.
9. Kim KS, Kim JM, Park KH, et al. The effect of cataract surgery on diurnal intraocular pressure fluctuation. J Glaucoma. 2009. 18:399–402.
10. Kaufmann C, Bachmann LM, Thiel MA. Comparison of dynamic contour tonometry with goldmann applanation tonometry. Invest Ophthalmol Vis Sci. 2004. 45:3118–3121.
11. Medeiros FA, Sample PA, Weinreb RN. Comparison of dynamic contour tonometry and goldmann applanation tonometry in African American subjects. Ophthalmology. 2007. 114:658–665.
12. Pepose JS, Feigenbaum SK, Qazi MA, et al. Changes in corneal biomechanics and intraocular pressure following LASIK using static, dynamic, and noncontact tonometry. Am J Ophthalmol. 2007. 143:39–47.
13. Boehm AG, Weber A, Pillunat LE, et al. Dynamic contour tonometry in comparison to intracameral IOP measurements. Invest Ophthalmol Vis Sci. 2008. 49:2472–2477.
14. Stalmans I, Harris A, Fieuws S, et al. Color Doppler imaging and ocular pulse amplitude in glaucomatous and healthy eyes. Eur J Ophthalmol. 2009. 19:580–587.
15. Dastiridou AI, Ginis HS, De Brouwere D, et al. Ocular rigidity, ocular pulse amplitude, and pulsatile ocular blood flow: the effect of intraocular pressure. Invest Ophthalmol Vis Sci. 2009. 50:5718–5722.
16. Stalmans I, Harris A, Vanbellinghen V, et al. Ocular pulse amplitude in normal tension and primary open angle glaucoma. J Glaucoma. 2008. 17:403–407.
17. Vulsteke C, Stalmans I, Fieuws S, Zeyen T. Correlation between ocular pulse amplitude measured by dynamic contour tonometer and visual field defects. Graefes Arch Clin Exp Ophthalmol. 2008. 246:559–565.
18. Kaufmann C, Bachmann LM, Robert YC, Thiel MA. Ocular pulse amplitude in healthy subjects as measured by dynamic contour tonometry. Arch Ophthalmol. 2006. 124:1104–1108.
19. Hsu SY, Sheu MM, Hsu AH, et al. Comparisons of intraocular pressure measurements: Goldmann applanation tonometry, noncontact tonometry, Tono-Pen tonometry, and dynamic contour tonometry. Eye (Lond). 2009. 23:1582–1588.
20. von Schulthess SR, Kaufmann C, Bachmann LM, et al. Ocular pulse amplitude after trabeculectomy. Graefes Arch Clin Exp Ophthalmol. 2006. 244:46–51.
21. Breusegem C, Fieuws S, Zeyen T, Stalmans I. The effect of trabeculectomy on ocular pulse amplitude. Invest Ophthalmol Vis Sci. 2010. 51:231–235.
22. Tabuchi H, Kiuchi Y, Ohsugi H, et al. Effects of corneal thickness and axial length on intraocular pressure and ocular pulse amplitude before and after cataract surgery. Can J Ophthalmol. 2011. 46:242–246.
23. Plange N, Rennings C, Herr A, et al. Ocular pulse amplitude before and after cataract surgery. Curr Eye Res. 2012. 37:115–119.
24. Pourjavan S, Boghossian P, Detry-Morel M. Comparison of the quality score of intraocular pressure and ocular pulse amplitude values measured by the Pascal dynamic contour tonometer. Int Ophthalmol. 2010. 30:1–5.
25. Edwards A, Fishman GA, Anderson RJ, et al. Visual acuity and visual field impairment in Usher syndrome. Arch Ophthalmol. 1998. 116:165–168.
26. Silver DM, Geyer O. Pressure-volume relation for the living human eye. Curr Eye Res. 2000. 20:115–120.
27. De Moraes CG, Reis AS, Cavalcante AF, et al. Choroidal expansion during the water drinking test. Graefes Arch Clin Exp Ophthalmol. 2009. 247:385–389.
28. Weizer JS, Asrani S, Stinnett SS, Herndon LW. The clinical utility of dynamic contour tonometry and ocular pulse amplitude. J Glaucoma. 2007. 16:700–703.
29. de Freitas Valbon B, Ventura MP, da Silva RS, et al. Central corneal thickness and biomechanical changes after clear corneal phacoemulsification. J Refract Surg. 2012. 28:215–219.
30. Kucumen RB, Yenerel NM, Gorgun E, et al. Corneal biomechanical properties and intraocular pressure changes after phacoemulsification and intraocular lens implantation. J Cataract Refract Surg. 2008. 34:2096–2098.
31. Vulsteke C, Stalmans I, Fieuws S, Zeyen T. Correlation between ocular pulse amplitude measured by dynamic contour tonometer and visual field defects. Graefes Arch Clin Exp Ophthalmol. 2008. 246:559–565.
32. Lee M, Cho EH, Lew HM, Ahn J. Relationship Between Ocular Pulse Amplitude and Glaucomatous Central Visual Field Defect in Normal-tension Glaucoma. J Glaucoma. 2012. 02. 24. (Epub ahead of print).
33. De Moraes CG, Reis AS, Cavalcante AF, et al. Choroidal expansion during the water drinking test. Graefes Arch Clin Exp Ophthalmol. 2009. 247:385–389.
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