TY - JOUR
T1 - Visual acuity in patients with keratoconus
T2 - a comparison with matched regular myopic astigmatism
AU - Mimouni, Michael
AU - Najjar, Riham
AU - Rabina, Gilad
AU - Vainer, Igor
AU - Kaiserman, Igor
N1 - Publisher Copyright:
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/2/4
Y1 - 2019/2/4
N2 - Purpose: To compare uncorrected distance visual acuity (UDVA) and best-corrected distance visual acuity (CDVA) between patients with keratoconus (KC) and matched patients with regular myopic astigmatism. Methods: This retrospective study included consecutive patients diagnosed with KC between 2008 and 2013 at Care-Vision Laser Centers, Tel-Aviv, Israel, and matched patients with regular myopic astigmatism. Data included were central corneal thickness (CCT), spherical equivalent (SE), cylinder (CYL), mean keratometric power, maximum keratometric power (K max ), UDVA, CDVA, and defocus equivalent (DEQ). Results: The KC group included 734 patients with a mean age of 33.8 ± 9.5 years. The matched, control group included 1462 patients with a mean age of 33.2 ± 9.7 years (p = 0.14). The mean SE and CYL of the KC group were − 3.34 ± 3.29D and − 3.01 ± 1.99D, respectively, compared to − 3.34 ± 2.92D (p = 0.98) and − 2.97 ± 1.35 (p = 0.58). Mean K (46.8 ± 3.3D versus 44.0 ± 1.8D, p < 0.0001) and K max (48.4 ± 4.0D versus 45.3 ± 2.0D, p < 0.0001) were statically significant higher in the KC group. CCT was significantly thinner in the KC group (444 ± 49 versus 527 ± 40 μm, p < 0.0001). The KC group had a better UDVA than the non-KC group (1.10 ± 0.68 versus 1.22 ± 0.64 logMAR, p < 0.0001). CDVA was significantly lower in the KC group (p < 0.001). Conclusions: For defocus equivalents above 6D, the KC group had better UDVA than the non-KC group in spite of worse CDVA.
AB - Purpose: To compare uncorrected distance visual acuity (UDVA) and best-corrected distance visual acuity (CDVA) between patients with keratoconus (KC) and matched patients with regular myopic astigmatism. Methods: This retrospective study included consecutive patients diagnosed with KC between 2008 and 2013 at Care-Vision Laser Centers, Tel-Aviv, Israel, and matched patients with regular myopic astigmatism. Data included were central corneal thickness (CCT), spherical equivalent (SE), cylinder (CYL), mean keratometric power, maximum keratometric power (K max ), UDVA, CDVA, and defocus equivalent (DEQ). Results: The KC group included 734 patients with a mean age of 33.8 ± 9.5 years. The matched, control group included 1462 patients with a mean age of 33.2 ± 9.7 years (p = 0.14). The mean SE and CYL of the KC group were − 3.34 ± 3.29D and − 3.01 ± 1.99D, respectively, compared to − 3.34 ± 2.92D (p = 0.98) and − 2.97 ± 1.35 (p = 0.58). Mean K (46.8 ± 3.3D versus 44.0 ± 1.8D, p < 0.0001) and K max (48.4 ± 4.0D versus 45.3 ± 2.0D, p < 0.0001) were statically significant higher in the KC group. CCT was significantly thinner in the KC group (444 ± 49 versus 527 ± 40 μm, p < 0.0001). The KC group had a better UDVA than the non-KC group (1.10 ± 0.68 versus 1.22 ± 0.64 logMAR, p < 0.0001). CDVA was significantly lower in the KC group (p < 0.001). Conclusions: For defocus equivalents above 6D, the KC group had better UDVA than the non-KC group in spite of worse CDVA.
KW - Astigmatism
KW - CDVA
KW - Defocus equivalent
KW - Keratoconus
KW - UDVA
UR - http://www.scopus.com/inward/record.url?scp=85058094871&partnerID=8YFLogxK
U2 - 10.1007/s00417-018-4188-1
DO - 10.1007/s00417-018-4188-1
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C2 - 30535968
AN - SCOPUS:85058094871
SN - 0721-832X
VL - 257
SP - 313
EP - 319
JO - Graefe's Archive for Clinical and Experimental Ophthalmology
JF - Graefe's Archive for Clinical and Experimental Ophthalmology
IS - 2
ER -