Retail Optometry is performs optical sales services at the Tun Hussein Onn National Eye Hospital. It sells optical products such as eyeglasses and contact lenses – common bread and butter of optical business. On top of that, it’s service is built around a clinical concept, which means that Retail Optometry also performs assessment and non-surgical, non-pharmaceutical management of ocular conditions such as fitting of specialty contact lenses for pathological corneas, and general assessment of ocular diseases for referral to ophthalmologist. Its manpower is filled with highly qualified and highly experienced optometrist, each with a clinical specialty.
Check refractive power of the eye, then prescribe and supply spectacles or soft contact lenses.
These contact lenses that are tailored to suite the individual contour of patients’ cornea. They are usually prescribed to individuals with high astigmatism or with corneal conditions that caused surface deformity such as keratoconus or pellucid marginal degeneration. These lenses can either be soft contact lenses or rigid gas permeable contact lenses (RGP).
- Rigid Gas Permeable Contact Lens
RGP is a type of custom-made contact lenses. They are made of PMMA, which is the same material as intra-ocular lenses. These lenses are usually given in cases with advanced corneal deformity that cannot be helped with the use of soft lenses. Soft contact lenses would follow the deformity of the cornea. However, the rigid material of RGP lenses would create an artificially smooth surface over a deformed cornea, thus allowing for clear vision (See Diagram 1).
ii. Scleral Lens
Scleral lenses are made of PMMA. However, they are larger in size compared to RGP. The larger size allows them to rest on the sclera (the white part of the eye), instead of on the cornea (See Diagram 2). The lens would arc over the cornea without touching it. They are usually useful when the cornea is too deformed that even RGP would not be able to restore clear vision, or when the cornea is sensitive that it cannot come in contact with a rigid material (See diagram 3).
- Assess the extent of low vision
- Prescribes and supplies low vision devices
- Trains patients in the use of low vision devices
- Consultation and referrals