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A multi-purpose system for corneal astigmatic marking

Year 2018, Volume: 10 Issue: 4, 444 - 448, 01.12.2018
https://doi.org/10.21601/ortadogutipdergisi.456720

Abstract

Aim: To evaluate a new astigmatism
marking system which creates corneal marks for proper toric intraocular lens
(IOL) placement to improve results of premium IOL surgery and limbal relaxing
incision surgery.

Material
and Method:
Patients
were randomly allocated into two groups for preoperative corneal marking in the
sitting position. A conventional pendulum marker and the new marking system
were compared for vertical misalignment and rotational misalignment. A
high-resolution anterior segment camera was used to document the corneal
markings, and rotational deviation and vertical misalignment were evaluated.

Results:
Each group
consisted of 40 eyes and all marking points were clearly identified. The mean
vertical misalignment in the pendulum marking group and in the new marking
system group was 0,71± 0,62 mm and 0,24 ± 0,12 mm, respectively.
There was a statistically significant difference in vertical misalignment
between the two groups (p < 0,05). The mean rotational deviation in the
pendulum marking group and the new marking system group was 1,9 ± 2,4 degrees
and 0,8 ± 1,3 degrees respectively, showing a statistically significant
difference (p < 0,05).







Conclusion: While the conventional pendulum marker showed a
certain amount of deviation and vertical misalignment, the new marking system
marked the desired axis and minimized some possible measurement errors. During
use of the new system, the entire cornea and conjunctiva were visible and the
procedure was controlled perfectly.

References

  • 1. Ma JJ, Tseng SS. Simple method for accurate alignment in toric phakic and aphakic intraocular lens implantation. J Cataract Refract Surg 2008;34:1631-6.
  • 2. Mendicute J, Irigoyen C, Aramberri J, Ondarra A, Montes-Mico R. Foldable toric intraocular lens for astigmatism correction in cataract patients. J Cataract Refract Surg 2008;34:601-7.
  • 3. Koshy JJ, Nishi Y, Hirnschall N, et al. Rotational stability of a single-piece toric acrylic intraocular lens. J Cataract Refract Surg 2010;36:1665-70.
  • 4. Alio JL, Pinero DP, Tomas J, Plaza AB. Vector analysis of astigmatic changes after cataract surgery with implantation of a new toric multifocal intraocular lens. J Cataract Refract Surg 2011;37:1217-29.
  • 5. Popp N, Hirnschall N, Maedel S, Findl O. Evaluation of 4 corneal astigmatic marking methods. J Cataract Refract Surg 2012;38:2094-9.
  • 6. Visser N, Berendschot TT, Bauer NJ, Jurich J, Kersting O, Nuijts RM. Accuracy of toric intraocular lens implantation in cataract and refractive surgery. J Cataract Refract Surg 2011;37:1394-402.
  • 7. Felipe A, Artigas JM, Diez-Ajenjo A, Garcia-Domene C, Alcocer P. Residual astigmatism produced by toric intraocular lens rotation. J Cataract Refract Surg 2011;37:1895-901.
  • 8. Swami AU, Steinert RF, Osborne WE, White AA. Rotational malposition during laser in situ keratomileusis. Am J Ophthalmol 2002;133:561-2.

Korneal astigmatik işaretleme için çok amaçlı bir sistem

Year 2018, Volume: 10 Issue: 4, 444 - 448, 01.12.2018
https://doi.org/10.21601/ortadogutipdergisi.456720

Abstract

Amaç:
Premium göz içi lens (GİL) cerrahisi ve limbal gevşetici insizyon cerrahisi
sonuçlarını daha iyi hale getirmek amacıyla uygun torik GİL
yerleştirilmesi için kornea işaretleri oluşturan yeni bir astigmatizma
işaretleme sistemini değerlendirmektir.

Gereç ve Yöntem: Hastalar oturma pozisyonunda
preoperatif korneal işaretleme için rastgele iki gruba ayrıldı. Konvansiyonel
bir sarkaç işaretleyici ve yeni işaretleme sistemi, dikey hizalama hatası ve
rotasyonel hizalama hatası açısından karşılaştırıldı. Korneal işaretlerin
belgelendirilmesinde yüksek çözünürlüklü ön segment kamera kullanıldı ve
rotasyonel sapma ve dikey hizalama hatası değerlendirildi.

Bulgular: Her bir grup 40 gözden oluşmaktaydı ve tüm işaret noktaları açıkça
tanımlandı. Sarkaç işaretleme grubunda ve yeni işaretleme sistemi grubunda
ortalama dikey hizalama hatası sırasıyla 0,71 ± 0,62 mm ve 0,24 ± 0,12 mm idi.
İki grup arasında dikey sapmada istatistiksel olarak anlamlı bir fark vardı (p
<0,05). Sarkaç işaretleme grubundaki ve yeni işaretleme sistemi grubundaki
ortalama rotasyonel sapma sırasıyla 1,9 ± 2,4 derece ve 0,8 ± 1,3 derece idi ve
iki grup arasında istatistiksel olarak anlamlı bir fark gösterdi (p <0,05).







Sonuçlar: Konvansiyonel sarkaç belirteci belirli bir miktar sapma ve dikey
hizalama hatası gösterse de, yeni işaretleme sistemi istenen ekseni işaretlemiş
ve bazı olası ölçüm hatalarını en aza indirmiştir. Yeni sistemin kullanımı
sırasında tüm kornea ve konjonktiva görünür idi ve prosedür mükemmel şekilde
kontrol edildi.

References

  • 1. Ma JJ, Tseng SS. Simple method for accurate alignment in toric phakic and aphakic intraocular lens implantation. J Cataract Refract Surg 2008;34:1631-6.
  • 2. Mendicute J, Irigoyen C, Aramberri J, Ondarra A, Montes-Mico R. Foldable toric intraocular lens for astigmatism correction in cataract patients. J Cataract Refract Surg 2008;34:601-7.
  • 3. Koshy JJ, Nishi Y, Hirnschall N, et al. Rotational stability of a single-piece toric acrylic intraocular lens. J Cataract Refract Surg 2010;36:1665-70.
  • 4. Alio JL, Pinero DP, Tomas J, Plaza AB. Vector analysis of astigmatic changes after cataract surgery with implantation of a new toric multifocal intraocular lens. J Cataract Refract Surg 2011;37:1217-29.
  • 5. Popp N, Hirnschall N, Maedel S, Findl O. Evaluation of 4 corneal astigmatic marking methods. J Cataract Refract Surg 2012;38:2094-9.
  • 6. Visser N, Berendschot TT, Bauer NJ, Jurich J, Kersting O, Nuijts RM. Accuracy of toric intraocular lens implantation in cataract and refractive surgery. J Cataract Refract Surg 2011;37:1394-402.
  • 7. Felipe A, Artigas JM, Diez-Ajenjo A, Garcia-Domene C, Alcocer P. Residual astigmatism produced by toric intraocular lens rotation. J Cataract Refract Surg 2011;37:1895-901.
  • 8. Swami AU, Steinert RF, Osborne WE, White AA. Rotational malposition during laser in situ keratomileusis. Am J Ophthalmol 2002;133:561-2.
There are 8 citations in total.

Details

Primary Language English
Subjects Health Care Administration
Journal Section Original article
Authors

Ertuğrul Can

Serkan Akkaya 0000-0003-1755-7123

Publication Date December 1, 2018
Published in Issue Year 2018 Volume: 10 Issue: 4

Cite

Vancouver Can E, Akkaya S. A multi-purpose system for corneal astigmatic marking. omj. 2018;10(4):444-8.

e-ISSN: 2548-0251

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