What Are Hard-to-Fit Contacts?

What Are Hard-to-Fit Contacts?

October 6, 2021

Some patients have difficulty wearing contact lenses. This could be due to surgery, certain conditions or impairments, and the shape of the eye. Doctors refer to them as hard-to-fit patients. With advances in technology, there has been an expansion in the types of contact lens designs available. These contact lenses are hard-to-fit contacts.


 Hard-to-fit patients usually have one of the following conditions: 
 

  • Giant papillary conjunctivitis (GPC).
     

  • Keratoconus.
     

  • Astigmatism.
     

  • Pellucid marginal degeneration.
     

  • Progressive nearsightedness.
     

  • Severe dry eye.
     

  • Post corneal transplant surgery.
     

  • Corneal scars.
     

  • Presbyopia.




Hard-to-Fit Contacts



These kinds of contacts are comfortable and effective. However, they require a specialized fitting that your eye doctor needs to be an expert at doing. He should know your condition and the different products available. This will help you find the right match for your specific condition. These kinds of lenses include:
 

  • Rigid gas permeable lenses.
     

  • Toric lenses.
     

  • Bifocal and multifocal lenses.
     

  • Hybrid lenses.




Rigid Gas Permeable



These are the most commonly used. They are preferable if you have dry eyes, GPC, and keratoconus. They also help in treating astigmatism where toric lenses are not fit for a patient. They allow oxygen to the cornea, permitting wear for extended periods. If you take care of them well, they can last you for up to two or three years.


GPC is a kind of conjunctivitis where the inner lid of the eye gets swollen. It worsens with the buildup of protein deposits that is common in soft lenses. Gas permeable lenses limit this buildup, reducing the symptoms of GPC. They are also great in treating keratoconus. This is because they do not put much pressure on the eye tissue and contain the corneal bulge. 




Toric Lenses



Toric lenses are specifically for treating astigmatism. The lenses custom fit the eye of the patient. Hydrogel or silicone hydrogel is the material used in most. This is because they can stay in place on the eye. 


In some patients, the lenses move when they blink or move their eyes. In these cases, the doctor uses rigid gas permeable instead. It takes trial and error to fit these lenses. Thus, they take time to custom fit. 




Bifocal and Multifocal Lenses



These are for correcting presbyopia. It is a common condition for people over 40 years. The lens in your eye becomes unable to focus from far to near. Many patients keep a pair of bifocal or multifocal glasses at hand. But some prefer contact lenses, which is an option.


For patients who want contacts, they get fitted for distance vision in one eye and near vision in another. But this creates problems with depth perception. The other option is fitting multifocal lenses. With these, both eyes are fit for distance and near vision. 




Hybrid Lenses



These have a gas permeable center with a soft outer ring. They can correct astigmatism, keratoconus, and presbyopia. They are more comfortable than traditional gas permeable lenses. This is because of their soft outer ring.




For more on hard-to-fit contacts, visit Family Vision Care Associates at our office in White Plains, New York. You can also call (914) 359-3300 today to schedule an appointment.

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