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Manqiang Peng, Muhammad Ahmad Khan, xuetao Huang, Ding Lin; Intraocular lens movement in different axial length. Invest. Ophthalmol. Vis. Sci. 2018;59(9):256.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate intraocular lens (IOL) movement, measured by two kinds of instruments in different axial length.
The IOL movement was measured using anterior segment optical coherence tomography (AS-OCT) and optical low-coherence reflectometry in 46 pseudophakic eyes. Postoperative uncorrected visual acuity was greater than or equal to 0.8 and none complication occurred in all patients. We took examination in three states. A: Change of IOL position in fogging and accommodating states, measured by AS-OCT. B: Change of IOL position before and after torchlight irradiating on the unexamined eye, measured by AS-OCT and optical low-coherence reflectometry. C: Change of IOL position before and after using 1% pilocarpine, measured by AS-OCT and optical low-coherence reflectometry. The patients were divided into two groups. 16 cases of axial length were greater than or equal to 26mm in group one. 30 cases were less than 26mm in group two.
No significant differences between two groups in the age, gender, type of IOL(p>0.05). There was no change of IOL position in A and B. IOL movements were 0.034±0.019mm measured by AS-OCT and 0.034±0.018mm measured by optical low-coherence reflectometry in group one. 4 IOLs had no movement in group one. IOL movements were 0.126±0.041mm measured by AS-OCT and 0.126±0.042mm measured by optical low-coherence reflectometry in group Two. IOL movements in group one were smaller than in group two(p<0.05).
Our results suggest that contraction of ciliary body can induce IOL movement . The IOL movement was much weaker in high myopia. Some even did not move in high myopia.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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