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The history of contact lenses
I0 Rigid gas permeable comeal lens ﬁtting 313 16 Bifocal and multifocal contact lenses
4 other sections not shown
acuity aspheric astigmatism axial edge back optic zone back surface back vertex power bifocal BOZD BOZR calculated cells centre thickness Chapter cleaning clearance clinical comeal comeal lenses conjunctiva contact lens Contact Lens Assoc Contact Lens Clin contact lens wear corneal curvature deposits difﬁcult disinfection edge lift effect epithelial epithelium extended wear Figure ﬁrst ﬁt ﬁtted ﬁtting ﬂat ﬂatter ﬂexible ﬂexure ﬂuorescein front surface giant papillary conjunctivitis high water content Holden hydrogel hydrogel lenses hydrogen peroxide hydrophilic increase keratometer keratometry lens design lens ﬁtting lens materials lens surface lens wearers limbus magniﬁcation measured meridian methacrylate method normal ocular oedema Ophthalmol Optician Optom oxygen oxygen permeability patient PMMA polymer practitioner protein radii reduced reﬂected refractive index residual astigmatism RGP lenses rigid lenses saline scleral lens signiﬁcant slit lamp soft contact lenses soft lenses solution speciﬁc spectacle spherical stroma tear ﬁlm toric soft toroidal total diameter vision visual