[
    {
        "id": "osp-12448",
        "type": "article-journal",
        "title": "Contact lens fitting after corneal collagen cross-linking",
        "author": [
            {
                "family": "Mandathara",
                "given": "Preeji Suderman"
            },
            {
                "family": "Kalaiselvan",
                "given": "Parthasarathi"
            },
            {
                "family": "Rathi",
                "given": "Varsha M"
            },
            {
                "family": "Murthy",
                "given": "Somasheila I"
            },
            {
                "family": "Taneja",
                "given": "Mukesh"
            },
            {
                "family": "Sangwan",
                "given": "Virender S"
            }
        ],
        "URL": "https://omanscience.com/ar/articles/contact-lens-fitting-after-corneal-collagen-cross-linking",
        "language": "en",
        "issued": {
            "date-parts": [
                [
                    2019
                ]
            ]
        },
        "container-title": "Oman Journal of Ophthalmology",
        "volume": "12",
        "issue": "3",
        "page": "177-180",
        "DOI": "10.4103/ojo.ojo_43_2018",
        "publisher": "Medknow Publications",
        "ISSN": "0974-620X",
        "abstract": "Background: Contact lenses (CLs) remain the mainstay in improving vision in patients having keratoconus. With corneal collagen cross-linking (CXL) performed worldwide, whether the same CLs can be used or needs replacement needed to be assessed and considered.\n\nAims: The aim of this study was to evaluate the changes in CL fitting following CXL.\n\nSettings and design: This is a retrospective study conducted at a tertiary center.\n\nSubjects and methods: We analyzed the medical records of patients who underwent CXL and used CL. Data collected included demographics, pre- and post-CXL refraction, corneal topography, anterior-segment examination, and CL [rigid gas permeable(RGP)] fitting details and duration between CXL and RGP fitting.\n\nStatistical analysis: Descriptive analysis and paired t-test were used to compare the pre- and post-CXL data on refraction, visual acuity, and CL parameters. The statistical significance was kept at P < 0.05.\n\nResults: Thirty-four eyes (keratoconus = 32, pellucid marginal degeneration = 1, and post-LASIK ectasia = 1) of 27 patients who used CL before and after undergoing CXL were analyzed. Mean duration between CXL and RGP lens use was 2.53 months. Mean sphere and cylinder post-CXL was -4.11 ± 4.32 D and -3.54 ± 2.51 D, respectively. A mean change of 0.75 ± 3.72 D sphere and 0.71 ± 3.39 D cylinder was noted post-CXL. The post-CXL best spectacle-corrected visual acuity (CVA) was 0.52 ± 0.36 and with RGP lens it was 0.09 ± 0.18. There was no significant difference in pre- and post-CXL RGP lens CVA (0.07 ± 0.09 and 0.09 ± 0.18, respectively; P = 0.556). Pre-CXL, 3-point-touch fitting was in 24 eyes (70.59%) and central fluorescein pooling was in 10 eyes (29.41%). Post-CXL, 30 eyes (88.24%) had 3-point-touch and central fluorescein pooling was found in four eyes (11.76%). One patient had CL intolerance after CXL. Of the 32 keratoconus eyes, 62.5% (n = 20 eyes) were prescribed new lenses; 37.5% (n = 12 eyes) continued using own lenses.\n\nConclusions: There was no significant difference in refraction, topography indices, and RGP lens parameters pre- and post-CXL. However, changes in RGP lens fitting characteristics suggest a possible change in shape or apex location of the cornea after CXL. RGP lenses remain the best option to improve visual acuity after CXL in corneal ectasia."
    }
]