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Poster 28
Poster Presentations ⫺1.00 ⫻165 O.S.; visual acuities of 20/60 O.D., 20/25 O.S. Biomicroscopy revealed a dense central stromal scar O.S., consistent with decreased VA O.S. A temporal iris cyst was present O.D., confirmed via 4M gonioscopy, and photodocumented. Dilated fundoscopy revealed no retinal pathology or other media opacity. Methods: A Visions Ultrathin RGP was fit in the following parameters: O.D. Power ⫺2.00, BC 7.54, Diameter 9.3; O.S. Power ⫺3.00, BC 7.46, Diameter 9.3. An over-refraction improved visual acuities to 20/25 O.D., 20/20 O.S. Conclusion: A 19-year-old girl with a history of “lazy-eye” O.D. was best-corrected to 20/60 O.D. with a spectacle lens. After ruling out strabismus and ocular pathology contributing to decreased vision, “arc-step” corneal topography revealed irregular astigmatism. A spherical RGP contact lens improved the acuity to a level of 20/25. This case illustrates the use topography with Placido ring algorithms to detect surface irregularities and aid in custom contact lens correction. Poster 28 Visual Impairment and Access to Eye Care in Adult Texans, 50 Years of Age and Over, 2005 R. Norman Bailey, O.D., M.P.H., Charlotte Stout, M.S., Norma McNab, Xinzhi Zhang, M.D., Ph.D., Michael Duenas, O.D., and Jinan Saaddine, M.D., M.P.H., University of Houston, College of Optometry, 505 J. Davis Armistead Building, Houston, Texas 77204 Background: Visual impairment, a chronic and serious condition, is 1 of the 10 most common causes of disability in the United States. More than 3.4 million Americans ages 40 and older are either blind or visually impaired. Purpose: The purpose of this poster is to examine visual impairment and access to eye care in 2005 among persons 50 years of age and older in Texas. Methods: The “Visual Impairment and Access to Eye Care” optional module was used as part of the 2005 statewide BRFSS telephone survey. The data, for those over 50 years of age from among the 6,000 BRFSS surveys conducted (3,210), were analyzed using SUDAAN to account for design complexity. Results: Results indicate that between 12% and 33% of the respondents self-reported experiencing some degree of visual impairment. Approximately 35% had not visited any eye care professional in the previous 12 months; of those, 20% cited cost/insurance as the reason. Almost 53% did not have any kind of health insurance for eye care. Prevalence of cataract, glaucoma, age-related macular degeneration, and diabetic retinopathy were 29%, 7%, 5%, and 4%, respectively. Summary: These data demonstrate the importance of the vision module in assessment of the burden of visual impairment and lack of access to eye care at the state level. These data also justify continued improvements to public health
277 prevention and control efforts aimed at addressing these concerns. (This study was made possible by a grant from the American Optometric Association to the Texas Department of State Health Services to fund the inclusion of the optional module, “Visual Impairment and Access to Eye Care,” in the 2005 Texas BRFSS survey.) Poster 29 Phi in the Eye Michael Bacigalupi, O.D., and Maryke Neiberg, O.D., Nova Southeastern University, College of Optometry, 3200 South University Drive, Ft. Lauderdale, Florida 33328 Background: Utilizing Hosny et al.’s data and Orbscan measurements of the human eye, we were able to demonstrate the presence of the Golden Ratio in the relationship of the corneal diameter to the diameter of the crystalline lens. In addition, the area of the cornea has been shown to correspond to the area of the optic nerve head by phi and the axial length. The area of the cornea is divided by the area of the optic nerve and then by phi; the outcome is equal to the axial length of the human eye. Explication: This “Divine Proportion,” also known as the Golden Ratio, can be stated in words as: The whole is to the larger in exactly the same proportion as the larger is to the smaller. Euclid, the Greek mathematician, described this relationship geometrically as A/B ⫽ B/C. The mathematical description of the Golden Ratio is the Greek symbol ⌽ (phi) and is expressed as the value 1.61803398. History: Human fascination with the Divine Proportion has existed for many hundreds of years due to its remarkable properties. There exists in architecture, art, music, design, and nature an identified proportion. This proportion is said to create harmony in the pattern of a flower, the spiral of a seashell, the beauty of a crystal, and the curvature of DNA. The dimensions of the King’s Chamber of the Great Pyramid in Egypt are based on the Golden Ratio; the paintings of Leonardo DaVinci, and the music of Claude Debussy all use the properties of phi. Many experiments have been carried out to prove that the proportions of the top models’ faces conform more closely to the Golden Ratio than that of the rest of the population. Therefore, phi is said to create beauty in the eye of the beholder. Conclusion: This study looks at the presence of the Golden Ratio in the functional perfection of the anatomy of the human eye. GLAUCOMA Poster 30 Glaucoma and Pregnancy: How do you treat? Mindy Nguyen, O.D., Lloyd Pate, O.D., and Pat Segu, O.D., University of Houston, College of Optometry, 505 J. Davis Armistead Building, Houston, Texas 77204 Background: Studies show that lowering intraocular pressure (IOP) reduces the rate of progression of glaucoma.
277 prevention and control efforts aimed at addressing these concerns. (This study was made possible by a grant from the American Optometric Association to the Texas Department of State Health Services to fund the inclusion of the optional module, “Visual Impairment and Access to Eye Care,” in the 2005 Texas BRFSS survey.) Poster 29 Phi in the Eye Michael Bacigalupi, O.D., and Maryke Neiberg, O.D., Nova Southeastern University, College of Optometry, 3200 South University Drive, Ft. Lauderdale, Florida 33328 Background: Utilizing Hosny et al.’s data and Orbscan measurements of the human eye, we were able to demonstrate the presence of the Golden Ratio in the relationship of the corneal diameter to the diameter of the crystalline lens. In addition, the area of the cornea has been shown to correspond to the area of the optic nerve head by phi and the axial length. The area of the cornea is divided by the area of the optic nerve and then by phi; the outcome is equal to the axial length of the human eye. Explication: This “Divine Proportion,” also known as the Golden Ratio, can be stated in words as: The whole is to the larger in exactly the same proportion as the larger is to the smaller. Euclid, the Greek mathematician, described this relationship geometrically as A/B ⫽ B/C. The mathematical description of the Golden Ratio is the Greek symbol ⌽ (phi) and is expressed as the value 1.61803398. History: Human fascination with the Divine Proportion has existed for many hundreds of years due to its remarkable properties. There exists in architecture, art, music, design, and nature an identified proportion. This proportion is said to create harmony in the pattern of a flower, the spiral of a seashell, the beauty of a crystal, and the curvature of DNA. The dimensions of the King’s Chamber of the Great Pyramid in Egypt are based on the Golden Ratio; the paintings of Leonardo DaVinci, and the music of Claude Debussy all use the properties of phi. Many experiments have been carried out to prove that the proportions of the top models’ faces conform more closely to the Golden Ratio than that of the rest of the population. Therefore, phi is said to create beauty in the eye of the beholder. Conclusion: This study looks at the presence of the Golden Ratio in the functional perfection of the anatomy of the human eye. GLAUCOMA Poster 30 Glaucoma and Pregnancy: How do you treat? Mindy Nguyen, O.D., Lloyd Pate, O.D., and Pat Segu, O.D., University of Houston, College of Optometry, 505 J. Davis Armistead Building, Houston, Texas 77204 Background: Studies show that lowering intraocular pressure (IOP) reduces the rate of progression of glaucoma.