Irregular Corneas: Improve Visual Function With Scleral Contact Lenses

Abstract

Both visual acuity and VF-14 may improve after fitting Rose K2 XL contact lenses in patients with irregular corneas. In addition, in our patients, these lenses can be worn for a longer period than GP corneal contact lenses.

Fitting Tips and Visual Rehabilitation of Irregular Cornea with a New Design of Corneoscleral Contact Lens: Objective and Subjective Evaluation

“…Our results are consistent with a prior report that revealed a significant degree of comfort in patients wearing this design of lenses for a mean of 9 hours a day [ 15 ]. Also, the results go hand in hand with previously reported data about Rose K lenses that indicates a high degree of comfort in keratoconus patients wearing their lenses for more than 10 hours daily [ 30 – 32 ].…”

“…Considering the same design of contact lenses used in our study (Rose K2 XL), Romero-Jiménez and Flores-Rodríguez [ 28 ] observed an improvement in VA from 0.14 logMAR with the patient's usual contact lens to 0.10 logMAR with the Rose K2 XL scleral lens ( p = 0.079). Another study [ 15 ] also noted statistically significant improvement, although patients had a poorer VA with their usual lenses than in the study of Romero et al An earlier study conducted by Stason et al [ 29 ] demonstrated that VA did not improve in all patients fitted with Boston ocular surface prosthesis (PROSE lenses), although none obtained poorer results. In our study, however, VA improved in all eyes after fitting with the Rose K2 XL lenses.…”

“…Corneoscleral lenses with an improved peripheral fit and larger diameter allow for a better alignment of the peripheral cornea and reduced edge standoff, which discourages lens dislocation and provides the patients with adequate comfort and optimal vision [ 13 – 15 , 23 ]. As demonstrated by our experience, ScCL can delay and even prevent the need for surgery, which carries risks of infection, rejection, and postoperative severe astigmatism [ 24 – 27 ].…”

“…Scleral contact lens (ScCL) seems to be more effective in irregular corneas than traditional corneal RGP lens since it provides an effective option for correction of residual ametropia and high-order aberrations (HOAs) and masking surface corneal irregularities with the tear lens between the posterior lens surface and anterior corneal surface [ 13 – 15 ].…”

“…Most of the previous studies measured the clinical performance of the ScCL in terms of improvement in VA [ 13 , 15 – 17 ]. To the best of our knowledge, this is the first study reporting the objective and subjective results of a new design of corneoscleral contact lens namely Rose K2 XL in cases of irregular corneas with a recording of its role in correcting of mesopic vision and HOAs.…”