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Secondary evaluation of hydrogel lens implants
B A Noble1, J M Hayward, C Huber
1Eye Department, Leeds General Infirmary.
Eye (London, England)
|January 1, 1990
Summary
Poly 2 hydroxyethylmethacrylate (P-HEMA) intraocular lenses provide good visual acuity. However, monitoring is needed for lens stability and potential pigment dispersion after implantation.
Area of Science:
- Ophthalmology
- Biomaterials Science
- Medical Device Technology
Background:
- Poly 2 hydroxyethylmethacrylate (P-HEMA) intraocular lenses (IOLs) are used in cataract surgery.
- Assessing the long-term outcomes of P-HEMA IOLs is crucial for patient care.
Purpose of the Study:
- To review outcomes in patients implanted with P-HEMA 'Hydrogel' intraocular lenses.
- Evaluate visual acuity and identify major complications associated with these IOLs.
Main Methods:
- Prospective trial involving 108 patients who received P-HEMA IOLs.
- Independent assessment at a median of 20 months post-surgery.
- Evaluation of visual acuity and ocular examination before and after pupil dilation.
Main Results:
- 91% of patients achieved visual acuity of 6/9 or better.
- Posterior capsule clarity was observed in 61%, with 39% experiencing fibrosis or pearl formation.
- Significant pigment dispersion was noted in 17.6% of patients, and 17% showed an atonic iris sphincter.
Conclusions:
- P-HEMA IOLs demonstrate favorable visual outcomes.
- Potential issues include lens stability and pigment shedding, requiring careful monitoring.
- Further research into long-term performance and complication rates is warranted.