Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract
Volume 4, Issue 4, August 2015, Pages: 25-30
Received: Sep. 3, 2015;
Accepted: Sep. 19, 2015;
Published: Sep. 29, 2015
Views 4600 Downloads 85
Hiba Mohammed Elhassan Ali Elawad, Faculty of Optometry and Visual Sciences, Department of Medical Photography, Alneelain University, Sudan, Khartoum
Mohammed Elhassan Ali Elawad, Faculty of Optometry and Visual Sciences, Department of Contact Lenses, Alneelain University, Sudan, Khartoum
The aim of the study is to determine the average intra-ocular lens power (IOL) for Sudanese patients with senile cataract. To contribute towards cataract treatment in Sudan and blindness prevention the goal of VISION 2020: The Right to Sight. Methods: Descriptive, cross-sectional, hospital based study was conducted in Makkah Eye Complex in Khartoum Alryad; in the period (October 2009-July 2010). Elderly patients (300); their age varied 60-95 years with senile cataract were asked to participate in the study. Participation was entirely voluntary. Information was collected by means of interview, clinical assessment and ocular measurements. The data were analyzed using SPAW Statistics-18 (2010) a modified version of SPSS. Results: The average horizontal corneal power (K1) for right eye (RE) 42.70D (SD ±1.625) and left eye (LE) 43.59D (SD±1.879).The average vertical corneal power (K2) for RE 43.97D (SD ±1.710) and left LE 44.85D (SD ±1.919). The average axial length is 23.72mm (SD ±1.143) and 23.16mm (SD ±0.939) for the RE and LE respectively. The average IOL power for Extra-capsular cataract extraction (ECCE); with IOL to be implanted in the posterior chamber (PCIOL) was calculated to be 20.03D (SD ±1.409) for the RE and 20.19D (SD ±2.639) for the LE. However, for Phacoemulsification (Phaco) the IOL power is calculated to be 20.06D (SD ±1.740) and 21.17D (SD ±1.658) for the RE and LE respectively. Conclusions: The average corneal power was found be (42-45D), axial length (23-24mm), where as the IOL power (20-21D); similar to international standards. In this study the biometric measurements were considered pre-operatively for all patients studied. Changes in biometric measurements after cataract extraction were not investigated since it wasn't part of the research objective; however, further studies are recommended to determine the influence of cataract extraction in corneal power, curvature, thickness, depth of anterior chamber and axial length.
Hiba Mohammed Elhassan Ali Elawad,
Mohammed Elhassan Ali Elawad,
Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract, Optics.
Vol. 4, No. 4,
2015, pp. 25-30.
Blindness Prevention Program: World Health Organization, WHO Report htpp//www.Sudanembassy.org/contemporaryLooks/blindness htm.
Michaels, David D., 1993. Ocular Disease in the Elderly. In Rosenbloom, Alfred A., Morgan Meredith W., 1993. Vision and Aging, 2nd ed. Butterworth-Heineman. Chapter 4. pp. 116-147.
Morgan, Meredith W., 1993. Normal Age-Related Vision Changes. In Rosenbloom, Alfred A., Morgan, Meredith W., 1993. Vision and Aging, 2nd ed. Butterworth-Heinemann. Chapter 6: 178-195.
Kanski, Jack J., 1994. Clinical Ophthalmology, 3rd ed. BH publication. Chapter 9: pp. 286-306.
HAI. 2000. Common Eye Disorders in Older People. AGE WAYS 53: 12.
Elawad M., and Elawad, H., 2011(a). EyeZone: Vision related quality of life in Sudanese patients with senile cataract (pre-operative cases). EyeZone Issue 35: January/Feburary 2011. Studies & research: pp 34-39.
Elawad, H., and Elawad, M., 2011 (b). The Self-Expressed Needs for Sudanese Patients with Senile Cataract. In Journal of Clinical and Experimental 2011, 2:5 April 2011. Avaliable online at: OMICS Publishing group (www.omicsonline.org). http://dx.doi.org/10.4172/2155-9570.1000158.
Elawad, H., and Elawad, M., 2011 (c).Age-related cataract: Senile cataract in Sudan. AL-Basar International Foundation 2011.
Bennett, Edward S., Remba, Melvin. J. and Weissman, Barry A., 1993. Contact Lenses and The Elderly Patient. In Rosenbloom Alfred A., and Morgan Meredith W., 1993. Vision and Aging, 2nd Edn. Butterworth-Heinemann. Chapter 9: 252-256.
Goss, David A., and Wess. Roger W., 2002. Introduction to The Optics of the Eye. Butterworth-Heinemann. Chapter 8: 186, Chapter 9: 204.
Etya'ale, D., 2002. Cataract in Sudan, Current Situation, Projections and Proposed Outlines for Control. Paper represented in VISION 2020: The Right to Sight Workshop (11-16 Feb, 2002).
NPPB. 2009. Report: Number of Cataract Surgeries Done in 2008 in Sudan. National Program for Prevention of Blindness.
NPPB. 2010. Report: Number of Cataract Surgeries Done in 2009 in Sudan. National Program for Prevention of Blindness.
Binnawi, Kamal H., Alshafae, B. and Hassan, A., 2011 Cataract Surgical Rate in Sudan. Paper presented in Europian Society for Cataract and Refractive Surgery (ESCRS), Feburary, 2011.
Binnawi, Kamal H., Alkhair, B. and Hassan, A., 2011. Cataract surgery in Sudan: Output, rate, coverage, quality and outcome. Paper represented in Sudanese Ophthalmological Society: The 17th Scientific Conference 13-14 April 2011.
Binnawi, Kamal H., 2011. Less than 10 years for 2020: Overview of progress in preventing blindness in Sudan. Paper represented in Sudanese Ophthalmological Society: The 17th Scientific Conference 13-14 April 2011.