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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 4 — Feb. 1, 1998
  • pp: 764–771

Optical Model for Light Distribution During Transscleral Cyclophotocoagulation

Babak Nemati, Andrew Dunn, Ashley J. Welch, and H. Grady Rylander  »View Author Affiliations


Applied Optics, Vol. 37, Issue 4, pp. 764-771 (1998)
http://dx.doi.org/10.1364/AO.37.000764


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Abstract

Transscleral cyclophotocoagulation (TSCPC) is currently performed clinically as an effective treatment for end-stage glaucoma. We develop a theoretical model for the analysis of optical attenuation phenomena during TSCPC as a basis for selection of an optimal wavelength. A multilayered Monte Carlo model was developed to calculate the fluence and the rate of heat generation in each tissue layer for the wavelengths of Nd:YAG, diode, ruby, krypton yellow, and argon lasers. Of the five wavelengths under study, our theoretical results suggest that the diode laser wavelength offers the best penetration through the conjunctiva, sclera, and ciliary muscle and highest absorption within the ciliary pigment epithelium.

© 1998 Optical Society of America

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(160.4760) Materials : Optical properties
(290.0290) Scattering : Scattering
(300.1030) Spectroscopy : Absorption

Citation
Babak Nemati, Andrew Dunn, Ashley J. Welch, and H. Grady Rylander, "Optical Model for Light Distribution During Transscleral Cyclophotocoagulation," Appl. Opt. 37, 764-771 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-4-764


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References

  1. H. Weve, “Die Zyklodiatermie das Corpus Ciliare bei Glaukom,” Zenterlabl Ophthalmol. 97, 562–569 (1933).
  2. D. S. Walton and W. M. Grant, “Penetrating cyclodiathermy for filtration,” Arch. Ophthalmol. 83, 47–48 (1970).
  3. G. M. Haik, L. A. Breffeilh, and A. Barbar, “Beta irradiation as a possible therapeutic agent in glaucoma: an experimental study with the report of a clinical case,” Am. J. Ophthalmol. 31, 945–952 (1948).
  4. F. M. Polack and A. de Roetth, “Effect of freezing on the ciliary body (cyclocryotherapy),” Invest. Ophthalmol. 3, 164 (1964).
  5. P. F. Lee and O. Pomerantzeff, “Transpupillary cyclophotocoagulation of rabbit eyes: an experimental approach to glaucoma surgery,” Am. J. Ophthalmol. 71, 911–920 (1971).
  6. H. Beckman and J. Waeltermann, “Transscleral ruby laser cyclophotocoagulation,” Am. J. Ophthalmol. 98, 788–795 (1984).
  7. J. S. Schuman and C. A. Puliafito, “Laser cyclophotocoagulation,” Int. Ophthalmol. Clin. 30, 111–119 (1990).
  8. J. S. Schuman, A. R. Bellows, B. J. Shingleton, M. A. Latina, R. R. Allingham, C. D. Belcher, and C. A. Puliafito, “Contact transscleral Nd:YAG laser cyclophotocoagulation. Midterm results,” Ophthalmology 99, 1089–1094 (1992).
  9. M. M. Wright, A. L. Grajewski, and W. J. Feuer, “Nd:YAG cyclophotocoagulation: outcome of treatment for uncontrolled glaucoma,” Ophthalmic Surg. 22, 279–283 (1991).
  10. H. L. Hennis and W. C. Stewart, “Semiconductor diode laser transscleral cyclophotocoagulation in patients with glaucoma,” Am. J. Ophthalmol. 113, 81–85 (1992).
  11. A. Vogel, C. Dlugos, R. Nuffer, and R. Birngruber, “Optical properties of human sclera, and their consequences for transscleral laser applications,” Lasers Surg. Med. 11, 331–340 (1991).
  12. B. Nemati, H. G. Rylander, III, and A. J. Welch, “Optical properties of conjunctiva, sclera, and ciliary body and their consequences for transscleral cyclophotocoagulation,” Appl. Opt. 35, 3321–3327 (1996).
  13. M. Keijzer, S. L. Jacques, S. A. Prahl, and A. J. Welch, “Light distribution in artery tissue: Monte Carlo simulations for finite diameter laser beams,” Lasers Surg. Med. 9, 148–154 (1989).
  14. S. L. Jacques, C. A. Alter, and S. A. Prahl, “Angular dependence of HeNe laser light scattering by human dermis,” Lasers Life Sci. 1, 309–333 (1987).
  15. W. J. Geeraets, R. C. Williams, G. Chan, W. T. Ham, Jr., D. P. Guerry, III, and F. H. Schmidt, “The relative absorption of thermal energy in retina and choroid,” Invest. Ophthalmol. 1, 340–347 (1962).
  16. B. Nemati, “Transscleral argon cyclophotocoagulation: a preclinical feasibility study,” Ph.D. dissertation (University of Texas, Austin, Tex., 1995).
  17. E. B. Boettner and J. R. Wolter, “Transmission of the ocular media,” Invest. Ophthalmol. 1, 776–783 (1962).
  18. L. Wang and S. Jacques, “Monte Carlo modeling of light transport in tissues,” in Optical-Thermal Response of Laser-Irradiated Tissue, A. J. Welch and M. J. C. van Gemert, eds. (Plenum, New York, 1995), pp. 73–100.
  19. G. A. Peyman, M. D. Conway, M. Raichand, and J. Lin, “Histopathologic studies on transscleral argon-krypton photocoagulation with an exolaser probe,” Ophthalmic Surg. 15, 496–501 (1984).
  20. I. Immonen, P. Puska, and C. Raitta, “Transscleral contact krypton laser cyclophotocoagulation for treatment of glaucoma,” Ophthalmology 101, 876–882 (1994).
  21. C. Hampton and M. B. Shields, “Transscleral neodymium:YAG cyclophotocoagulation: a histologic study of human autopsy eyes,” Arch. Ophthalmol. 106, 1121–1123 (1988).
  22. J. S. Schuman, J. J. Jacobson, C. A. Puliafito, R. J. Noecker, and W. T. Reidy, “Experimental use of semiconductor diode laser in contact transscleral cyclophotocoagulation in rabbits,” Arch. Ophthalmol. 108, 1152–1157 (1990).
  23. A. P. Ferry, M. H. King, and D. W. Richards, “Histopathologic observations of human eyes following neodymium:YAG laser cyclophotocoagulation for glaucoma,” Trans. Am. Ophthalmol. Soc. 93, 315–331 (1995).
  24. T. Kivela, P. Puska, C. Raitta, I. Immonen, and A. Tarkkanen, “Clinically successful contact transscleral krypton laser cyclophotocoagulation,” Arch. Ophthalmol. 113, 1447–1453 (1995).

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