Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract

Hiba Mohammed Elhassan Ali Elawad; Mohammed Elhassan Ali Elawad

doi:doi:10.11648/j.optics.20150404.11

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Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract

Hiba Mohammed Elhassan Ali Elawad, Mohammed Elhassan Ali Elawad

Published in Optics (Volume 4, Issue 4)

Received: 3 September 2015 Accepted: 19 September 2015 Published: 29 September 2015

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Abstract

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.

Published in	Optics (Volume 4, Issue 4)
DOI	10.11648/j.optics.20150404.11
Page(s)	25-30
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Senile Cataract, Biometric Measurements, Corneal Power, Axial Length, Inta-Ocular Lens, Ophthalmic Ultrasonography, Phacoemulsification, Extra-Capsular Cataract Extraction

References

[1]	Blindness Prevention Program: World Health Organization, WHO Report htpp//www.Sudanembassy.org/contemporaryLooks/blindness htm.
[2]	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.
[3]	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.
[4]	Kanski, Jack J., 1994. Clinical Ophthalmology, 3rd ed. BH publication. Chapter 9: pp. 286-306.
[5]	HAI. 2000. Common Eye Disorders in Older People. AGE WAYS 53: 12.
[6]	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.
[7]	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.
[8]	Elawad, H., and Elawad, M., 2011 (c).Age-related cataract: Senile cataract in Sudan. AL-Basar International Foundation 2011.
[9]	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.
[10]	Goss, David A., and Wess. Roger W., 2002. Introduction to The Optics of the Eye. Butterworth-Heinemann. Chapter 8: 186, Chapter 9: 204.
[11]	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).
[12]	NPPB. 2009. Report: Number of Cataract Surgeries Done in 2008 in Sudan. National Program for Prevention of Blindness.
[13]	NPPB. 2010. Report: Number of Cataract Surgeries Done in 2009 in Sudan. National Program for Prevention of Blindness.
[14]	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.
[15]	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.
[16]	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.

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Hiba Mohammed Elhassan Ali Elawad, Mohammed Elhassan Ali Elawad. (2015). Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract. Optics, 4(4), 25-30. https://doi.org/10.11648/j.optics.20150404.11

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ACS Style

Hiba Mohammed Elhassan Ali Elawad; Mohammed Elhassan Ali Elawad. Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract. Optics. 2015, 4(4), 25-30. doi: 10.11648/j.optics.20150404.11

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AMA Style

Hiba Mohammed Elhassan Ali Elawad, Mohammed Elhassan Ali Elawad. Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract. Optics. 2015;4(4):25-30. doi: 10.11648/j.optics.20150404.11

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@article{10.11648/j.optics.20150404.11,
  author = {Hiba Mohammed Elhassan Ali Elawad and Mohammed Elhassan Ali Elawad},
  title = {Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract},
  journal = {Optics},
  volume = {4},
  number = {4},
  pages = {25-30},
  doi = {10.11648/j.optics.20150404.11},
  url = {https://doi.org/10.11648/j.optics.20150404.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.optics.20150404.11},
  abstract = {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.},
 year = {2015}
}

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TY  - JOUR
T1  - Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract
AU  - Hiba Mohammed Elhassan Ali Elawad
AU  - Mohammed Elhassan Ali Elawad
Y1  - 2015/09/29
PY  - 2015
N1  - https://doi.org/10.11648/j.optics.20150404.11
DO  - 10.11648/j.optics.20150404.11
T2  - Optics
JF  - Optics
JO  - Optics
SP  - 25
EP  - 30
PB  - Science Publishing Group
SN  - 2328-7810
UR  - https://doi.org/10.11648/j.optics.20150404.11
AB  - 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.
VL  - 4
IS  - 4
ER  -

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Author Information

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

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Plain Text BibTeX RIS

APA Style

Hiba Mohammed Elhassan Ali Elawad, Mohammed Elhassan Ali Elawad. (2015). Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract. Optics, 4(4), 25-30. https://doi.org/10.11648/j.optics.20150404.11

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ACS Style

Hiba Mohammed Elhassan Ali Elawad; Mohammed Elhassan Ali Elawad. Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract. Optics. 2015, 4(4), 25-30. doi: 10.11648/j.optics.20150404.11

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AMA Style

Hiba Mohammed Elhassan Ali Elawad, Mohammed Elhassan Ali Elawad. Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract. Optics. 2015;4(4):25-30. doi: 10.11648/j.optics.20150404.11

Copy | Download

@article{10.11648/j.optics.20150404.11,
  author = {Hiba Mohammed Elhassan Ali Elawad and Mohammed Elhassan Ali Elawad},
  title = {Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract},
  journal = {Optics},
  volume = {4},
  number = {4},
  pages = {25-30},
  doi = {10.11648/j.optics.20150404.11},
  url = {https://doi.org/10.11648/j.optics.20150404.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.optics.20150404.11},
  abstract = {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.},
 year = {2015}
}

Copy | Download

TY  - JOUR
T1  - Biometric Measurements: Average Intra-Ocular Lens Power for Sudanese Patients with Senile Cataract
AU  - Hiba Mohammed Elhassan Ali Elawad
AU  - Mohammed Elhassan Ali Elawad
Y1  - 2015/09/29
PY  - 2015
N1  - https://doi.org/10.11648/j.optics.20150404.11
DO  - 10.11648/j.optics.20150404.11
T2  - Optics
JF  - Optics
JO  - Optics
SP  - 25
EP  - 30
PB  - Science Publishing Group
SN  - 2328-7810
UR  - https://doi.org/10.11648/j.optics.20150404.11
AB  - 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.
VL  - 4
IS  - 4
ER  -

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