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Anales de la Sociedad Mexicana de Oftalmología y Archivos de la Asociación Para Evitar la Ceguera en México

2006, Number 6

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Rev Mex Oftalmol 2006; 80 (6)

Resultados refractivos post cirugía de catarata en pacientes miopes

Kaiser-Lomparte JF, Chávez-Mondragón E, Morales-Gómez ME, Matiz-Moreno H, Garzón M, Rodríguez-Revilla H, Urrutia BI

Language: Spanish
References: 13
Page: 297-300
PDF size: 32.97 Kb.


ABSTRACT

Purpose: To compare the refractive results after cataract surgery in myopic patients with intra ocular lens implants calculated with SRKT and SRKII formulas.
Methods: We examined the charts of patients with an axial length greater than 25 mm, after phacoemulsification surgery. We selected 3 groups, 30 patients in each, divided by axial length: group 1: 25 to 27.9 mm, group 2: 28 to 29.9 mm, group 3: greater than 30 mm. We calculated the number of patients with expected postoperative refractions (+1 to –1) and the non expected (out of range) in the three groups. For our calculations we used the following formula: R = Re - [(suggested IOL – empiric ideal IOL) x 0.50]. Statistical analysis: chi-square.
Results: Group 1: X² = 2.45, p = 0.1172. Group 2: X² = 2.50, p = 0.1138. Group 3: X² = 4.29, p = 0.0384. The range of error was about –1 to –3 diopters in each group.
Conclusions: There is no significant difference in patients with axial length of 25 to 29.9 mm. There is a significant difference in patients with axial length greater than 30 mm.


REFERENCES

  1. Holladay JT, Musgrove KH, Prager TC y cols. A three-part system for refining intraocular lens power calculations. J Cataract Refract Surg 1988; 14:17-24.

  2. Sanders DR, Retzlaff J, Kraff MC. Comparison of SRKII formula and other second generation formulas. J Cataract Refract Surg 1988; 14:136-141.

  3. Olsen T, Thim K, Corydon L. Theoretical versus SRKI and SRKII calculation of intraocular lens power. J Cataract Refract Surg 1990; 16:217-225.

  4. Thompson JT, Maumenee AE, Baker CC. A new posterior chamber intraocular lens formula for axial myopes. Ophthalmology 1984; 91:485-488.

  5. Drews RC. Reliability of lens implant power formulas in hyperopes and myopes. Ophthalmic Surg 1988; 19:11-15.

  6. Huber C. Effectiveness of intraocular lens calculations in high ametropia. J Cataract Refract Surg 1989; 15:667-672.

  7. Olsen T, Thim K, Corydon L. Accuracy of the newer generation intraocular lens power calculation formulas in long and short eyes. J Cataract Surg 1990; 17:187-193.

  8. Retzlaff J, Sanders DR, Kraff MC. Development of the SRKT intraocular lens implant power calculation formula. J Cataract Refract Surg 1990; 16:333-340.

  9. Zaldívar R, Shultz M, Davidorf J. Intraocular lens power calculations in patients with extreme myopia. J Cataract Refract Surg 2000; 26:668-674.

  10. Hulley S. Diseño de la Investigación Clínica. Ediciones Doyma, 1993.

  11. Dowson B. Bioestadística Médica. Asociación y predicción. Ed. El Manual Moderno. 2da edición. 1997. 195-196.

  12. Buratto L, Osher R, Maskt S. Cataract surgery in complicated cases. Ed. Slack. 2000.

  13. Olsen T. Intraocular lens power calculation. J Cataract Refract Surg 1988; 14: 452.




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