Guidelines for best patient and lens selection to optimize success with the MagniVue MF lens:

Begin with a full examination which should include a comprehensive patient history and details of their visual requirements and needs, along with the normal slit lamp evaluation and keratometry refraction. In addition measure amplitudes of accommodation, working distance and determined eye dominance.

Best Vision Sphere:

Give the maximum PLUS that will maintain good visual acuity. Astigmatism of up to 0.50DS is usually acceptable.

Ophthalmoscopic and slit lamp examination should help to rule out any contraindications to wearing soft lenses. The lens is successfully fitted on a wide range of corneal shapes with only one base curve.

Insert the lens and immediately check the acuity. This should be very close to the final visual acuity. Wait one hour and do a complete examination. There should be movement of 1.00-1.50mm. A static lens is not acceptable. Your over refraction should be up to ±0.50DS and then adjust accordingly. Short sighted patients – leave on red.

Fitting MagniVue MF lenses:

By following the outlined steps, fitting the MagniVue MF lens is easy. To optimize success, it is important to remember that the fitter’s positive attitude is essential. The contact lens specialist must be able to instill confidence in the patient. It is important to have a large stock of lenses to choose from, enabling the patient to leave the fitting session with a lens prescription that is close to the optimal prescription. By taking notice of the suggested fitting pearls, it should be possible for you to achieve over a 70% success rate.

Choose candidates carefully:

1. Evaluate vocational and personal needs appropriately. Educate the patient regarding some possible compromise in vision. The distance and near vision may not be as sharp as the visual acuity achieved when wearing spectacles or single vision contact lenses, but it should be comparable.

2. Ensure current distance and near subjective refractions are accurate and keratometry readings will be necessary for selecting the initial lenses.

3. Contact the patient three to four days after dispensing the lenses. If the patient is unhappy with their vision, then advise them to discontinue wearing the contact lenses until his next visit to the office, when you can address the problem properly. However, ask the patient to wear the lenses at least four hours before they come for the recheck visit. This procedure is important to ensure that the patient doesn't just give up and decide prematurely against wearing multifocal contact lenses.

IMPORTANT TIPS TO REMEMBER:

1. Increase your success rate by selecting carefully possible candidates to fit.

2. Always check the patient binocularly with their multi focal contact lenses.

3. Check the reading acuity with good illumination at a distance of 40cm.

4. Over refraction binocularly in ±0.25DS steps and change accordingly.

5. Check the patient for distance using an outside vista. Remember the reading zone is in the centre of the lens.

6. Hypermetropes will adjust to near vision immediately. Distance vision will improve in three to seven days.

7. Do not over refract the MagniVue MF lens using an auto refractor.

Fitting:

1. Slit lamp evaluation and routine checks for contact lenses

2. Accurate current distance and near subjective refractions

3. K readings – remember the lens has one base curve of 8.70mm. Select the average K reading between 7.40 to 8.00

4. Selecting the first choice lenses should be based on the following:

Fitting the First Choice:

Start with +0.50DS more than the lens prescription, making sure that the patient is comfortable on red. Test the patient for reading at a distance of approximately 40 cm from the eye with good illumination. Fitting Tip: For distance fittings, always ask the patient to look at an actual view outside. 3-14