Late In-the-bag intraOcular Lens dislocatioN Surgery (LION)

  • days left to enroll
  • participants needed
  • sponsor
    Oslo University Hospital
Updated on 30 January 2022


Overall aim of the study is to compare the safety and efficacy of two different surgical methods to treat Late In-the-bag intraocular lens dislocation.


Cataract is a condition of unclear lens that cause poor vision. The only treatment is surgery where the blurred biological lens is replaced with an artificial clear lens (IOL). Most people who operate achieve full vision. Nevertheless, serious complications may occasionally occur, and one of these is dislocation of the entire complex with IOL and lens capsule. This requires surgical treatment.

In this study the investigators want to compare two different surgical methods used in late dislocation of IOL inside the capsule after cataract surgery. Patients will be randomly affiliated to either the suturing of existing IOL / capsule complex, or lens exchange to an IOL fixed to the iris.

The focus of the trial will be especially on complications and other eye changes in the early stages of surgery. Today, little data is available on these topics, and the investigators believe that new knowledge can bring us closer to a response to preferred operating techniques and an optimal drug drop regime for the patient group.

Condition Intraocular Lens Dislocation
Treatment IOL repositioning, IOL exchange
Clinical Study IdentifierNCT03276104
SponsorOslo University Hospital
Last Modified on30 January 2022


Yes No Not Sure

Inclusion Criteria

IOL inside the capsule ("in-the-bag")
Late dislocation (more than 6 months after cataract surgery)
IOL visible in the pupillary area in the supine position and hence possible to perform surgery with an anterior approach
Eligibility for both operation methods
Ability to cooperate fairly well during the examinations
Willing to participate in the study, e.g. willingness to participate at all control visits

Exclusion Criteria

IOL designs that cannot be repositioned with a suture loop, such as plate-haptic IOLs without holes in the peripheral part
Eyes with especially thin sclera
Active uveitis or pronounced iris pathology
Eyes with previously performed Descemet's Stripping Automated Endothelial Keratoplasty (DSAEK)
Totally dislocated IOL into the posterior segment of the eye requiring pars plana vitrectomy
Eyes that prior to cataract extraction had a subluxated lens in need of surgery with a Cionni capsular tension ring (e.g. patients with Marfan syndrome and ectopia lentis)
Cases requiring a change in refraction. Risk of severe anisometropia
Patients unable to lie in supine position for surgery in local anesthesia, e.g. severe chronic obstructive pulmonary disease and severe heart failure
Patients using anticoagulants that cannot be discontinued
For patients with dislocated IOLs in both eyes during the study period, only
the first operated eye will be included. Patients without prospects of
improvement in vision will be excluded
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