Abstract
Purpose
To assess corneal edema after torsional phacoemulsification using anterior segment optical coherence tomography (AS-OCT) and Scheimpflug photography (Pentacam).
Methods
Seventy-six eyes with cataract surgery were randomized into 2 groups: a 2.2 mm micro-coaxial incision group (n = 37) and a 2.8 mm standard incision group (n = 39). Patients were examined preoperatively and at 1 day, 1 week and 1 month postoperatively. Incision architecture and pachymetry at the wound level were measured by AS-OCT. The corneal volume within 3.0 and 10.0 mm circles of the cornea was measured using Pentacam.
Results
The cumulative dissipated energy (CDE) was lower in the micro-coaxial incision (2.2 mm) group than in the standard incision (2.8 mm) group (P = 0.043). Corneal edema measurements showed less corneal thickness at the endothelial side of the incision on postoperative day 1 in the micro-incision group (1061 ± 76 vs. 1153 ± 97 μm, P = 0.041). The corneal volume within the 10.0 mm circle was less on postoperative day 1 in the micro-incision group (63.75 ± 4.83 vs. 65.97 ± 4.52 mm3, P = 0.035). The endothelial cell count did not change significantly throughout the study.
Conclusion
The micro-coaxial 2.2 mm incision may incur slightly less damage than the 2.8 mm standard incision in the context of torsional phacoemulsification. Observation of corneal morphology and damage using AS-OCT and Pentacam can be helpful in the evaluation and quantification of fine corneal edema.
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References
Tsuneoka H, Shiba T, Takahashi Y. Feasibility of ultrasound cataract surgery with a 1.4 mm incision. J Cataract Refract Surg. 2001;27:934–40.
Leaming DV. Practice styles and preferences of ASCRS members—2003 survey. J Cataract Refract Surg. 2004;30:892–900.
Kaushik S, Ram J, Brar GS, Bandyopadhyay S. Comparison of the thermal effect on clear corneal incisions during phacoemulsification with different generation machines. Ophthalmic Surg Lasers Imaging. 2004;35:364–70.
Praveen MR, Vasavada AR, Gajjar D, Pandita D, Vasavada VA, Vasavada VA, et al. Comparative quantification of ingress of trypan blue into the anterior chamber after microcoaxial, standard coaxial, and bimanual phacoemulsification: randomized clinical trial. J Cataract Refract Surg. 2008;34:1007–12.
Bourne WM, Kaufman HE. Specular microscopy of human corneal endothelium in vivo. Am J Ophthalmol. 1976;81:319–23.
Laing RA, Sandstrom MM, Leibowitz HM. Clinical specular microscopy. II. Qualitative evaluation of corneal endothelial photomicrographs. Arch Ophthalmol. 1979;97:1720–5.
Waring GO 3rd, Bourne WM, Edelhauser HF, Kenyon KR. The corneal endothelium. Normal and pathologic structure and function. Ophthalmology. 1982;89:531–90.
Ohara K, Tsuru T, Inoda S. Morphometric parameters of the corneal endothelial cells. Nippon Ganka Gakkai Zasshi. 1987;91:1073–8.
Tagawa H, Kado M, Okada A, Furukawa H. Property and clinical availability of the noncontact autofocus specular microscope. Nippon Ganka Gakkai Zasshi. 1994;98:772–6.
Torres LF, Saez-Espinola F, Colina JM, Retchkiman M, Patel MR, Agurto R, et al. In vivo architectural analysis of 3.2 mm clear corneal incisions for phacoemulsification using optical coherence tomography. J Cataract Refract Surg. 2006;32:1820–6.
Uçakhan OO, Gesoğlu P, Ozkan M, Kanpolat A. Corneal elevation and thickness in relation to the refractive status measured with the Pentacam Scheimpflug system. J Cataract Refract Surg. 2008;34:1900–5.
Lundberg B, Jonsson M, Behndig A. Postoperative corneal swelling correlates strongly to corneal endothelial cell loss after phacoemulsification cataract surgery. Am J Ophthalmol. 2005;139:1035–41.
Mencucci R, Ponchietti C, Virgili G, Menchini U. Corneal endothelial damage after cataract surgery: microincision versus standard technique. J Cataract Refract Surg. 2006;32:1351–4.
Dick HB, Kohnen T, Jacobi FK, Jacobi KW. Long-term endothelial cell loss following phacoemulsification through a temporal clear corneal incision. J Cataract Refract Surg. 1996;22:63–71.
Hayashi K, Hayashi H, Nakao F, Hayashi F. Risk factors for corneal endothelial injury during phacoemulsification. J Cataract Refract Surg. 1996;22:1079–84.
Miyata K, Nagamoto T, Maruoka S, et al. Efficacy and safety of the soft-shell technique in cases with a hard lens nucleus. J Cataract Refract Surg. 2002;28:1546–50.
Milla′ E, Verge′s C, Cipre′s M. Corneal endothelium evaluation after phacoemulsification with continuous anterior chamber infusion. Cornea. 2005;24:278–82.
Kim EK, Cristol SM, Geroski DH, McCarey BE, Edelhauser HF. Corneal endothelial damage by air bubbles during phacoemulsification. Arch Ophthalmol. 1997;115:81–8.
Kim EK, Cristol SM, Kang SJ, Edelhauser HF, Kim HL, Lee JB. Viscoelastic protection from endothelial damage by air bubbles. J Cataract Refract Surg. 2002;28:1047–53.
Suzuki H, Takahashi H, Hori J, Hiraoka M, Igarashi T, Shiwa T. Phacoemulsification associated corneal damage evaluated by corneal volume. Am J Ophthalmol. 2006;142:525–8.
Mencucci R, Ambrosini S, Ponchietti C, Marini M, Vannelli GB, Menchini U. Ultrasound thermal damage to rabbit corneas after simulated phacoemulsification. J Cataract Refract Surg. 2005;31:2180–6.
Mackool RJ, Russell RS. Effect of foldable intraocular lens insertion on incision width. J Cataract Refract Surg. 1996;22:571–4.
Fine IH, Hoffman RS, Packer M. Profile of clear corneal cataract incisions demonstrated by ocular coherence tomography. J Cataract Refract Surg. 2007;33:94–7.
Kreisler KR, Mortenson SW, Mamalis N. Endothelial cell loss following “modern” phacoemulsification by a senior resident. Opthalmic Surg. 1992;23:158–60.
Suzuki H, Oki K, Takahashi K, Shiwa T, Takahashi H. Functional evaluation of corneal endothelium by combined measurement of corneal volume alteration and cell density after phacoemulsification. J Cataract Refract Surg. 2007;33:2077–82.
Acknowledgment
This work was supported by the Korea Healthcare Technology R&D Project, Ministry for Health Welfare & Family Affairs, Republic of Korea (A 090573).
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Li, YJ., Kim, HJ. & Joo, CK. Early changes in corneal edema following torsional phacoemulsification using anterior segment optical coherence tomography and Scheimpflug photography. Jpn J Ophthalmol 55, 196–204 (2011). https://doi.org/10.1007/s10384-011-0007-5
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DOI: https://doi.org/10.1007/s10384-011-0007-5