title: Hydroview lens implant calcification: 186 exchanges at a district general hospital.
abstract: OBJECTIVE
  This paper describes the experience at a district general hospital of coping with an abrupt onset of calcification of Hydroview intraocular lens (IOL) implants requiring exchange surgery mostly for symptoms of glare, even though the visual acuities were relatively good.
  
  
  METHODS
  In this retrospective study, the operative details of 174 consecutive lens exchanges by one surgeon were retrieved from the surgeon's notes. Of these, pre and post-operative details of 106 consecutive patients were obtained from the hospital notes.
  
  
  RESULTS
  Of the 174 lens exchanges, all were sutureless except one and 31 eyes (18%) had had previous capsulotomies. Of 143 eyes with intact posterior capsules, eight (5.6%) needed anterior vitrectomy. Lens replacements were in the bag in 136 (95%), in the sulcus in five (3.5%), and in the anterior chamber in two (1.5%). Of the 31 eyes with previous capsulotomies, 10 (32%) needed anterior vitrectomy. Lens replacements were in the bag in 22 (71%) and in the sulcus in the remaining nine cases (29%). Postoperatively the best-corrected visual acuity was improved in 53%, remained the same in 35%, and deteriorated in 12%.
  
  
  CONCLUSIONS
  The lens exchange procedure was mostly predictable with satisfactory visual results allowing preoperative counselling of risks to be similar to that for cataract surgery. The onset and resolution of the period of implantation of lenses requiring exchange has not been explained.
authors.affiliation: Eye Department, Peterborough District Hospital, Peterborough, Cambs, UK.
authors.forename: P
authors.initials: P
authors.lastname: Syam
authors.forename: P
authors.initials: P
authors.lastname: Byrne
authors.forename: G
authors.initials: G
authors.lastname: Lewis
authors.forename: T
authors.initials: T
authors.lastname: Husain
authors.forename: G
authors.initials: G
authors.lastname: Kleinmann
authors.forename: N
authors.initials: N
authors.lastname: Mamalis
authors.forename: D J
authors.initials: DJ
authors.lastname: Apple
authors.forename: T
authors.initials: T
authors.lastname: Rimmer
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002114:Calcinosis / Q000209:etiology*; D020878:Device Removal / Q000191:economics / Q000379:methods* / Q000706:statistics & numerical data; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D005500:Follow-Up Studies; D006767:Hospitals, District; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000378:metabolism; D007910:Lenses, Intraocular / Q000009:adverse effects* / Q000592:standards; D016365:Liability, Legal; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D012086:Reoperation / Q000379:methods; D012189:Retrospective Studies; D014792:Visual Acuity
chemical_list: D005227:Fatty Acids; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate