3 Presbyopic patient Usually over 40 years of age Unable to accommodate.Near VA continues to decline until age 60.These patient’s may have refractive error in addition the presbyopia.
4 Presbyopic patient There are a lot of options. Make sure that you go over all of the options with the patient.Ask the patient what they hope to achieve.CL’s for distance with readers over the top.Bifocal CL’sMonovision
5 Bifocal contact lenses Bifocal contact lenses Presbyopic patientBifocal contacts correct for distance, intermediate and near vision.Distance VA is in the center of the CL and concentric rings on the outer portion of the CL are for intermediate and near VA.While focusing at a distance the pupil is smaller, using the center portion of the CL.While focusing closer, the pupil gets larger, utilizing the outer portion of the CL.Bifocal CL’s take several tries to get the best VA.Distance VA may be fine for the patient but the near VA may not be clear enough and have to be changed, which will effect the dist VA.Thus, several tries to get the best VA in ALL focal lengths.Make sure the patient know that their VA will not be perfect at all focal lengths. There will be a sacrifice of clarity for the convenience.Bifocal contact lensesBifocal contact lenses
6 Bifocal contact lenses Bifocal contact lenses Presbyopic patientTake your favorite teacher!44 year oldWants CL’s for dist and near.Has dist CL’s and readers now. Not happy with it!M Rx= OD sphOS sphAdd OUBest corrected VAOD 20/40OS 20/20Bifocal contact lensesBifocal contact lenses
7 Bifocal contact lenses Bifocal contact lenses Presbyopic patientTrial lens Acuvue bifocalOnly has adds of ,+1.50,+2.00 &+2.50Trial lensOD-3.50 add +1.00OS-3.00 add +1.00VA OD 20/40VA OS 20/30Near VA OD 20/40Near VA OS 20/30Normal VA is 20/40 &20/20 try a new lens!Acuvue bifocal trialODOSVA OD 20/50, 20/40VA OS 20/25, 20/25Patient is not happy with this either! Pain in theOn to the next lens.Bifocal contact lensesBifocal contact lenses
8 Bifocal contact lenses Bifocal contact lenses Presbyopic patientLet’s try a Cvue bifocal trial lens.OD-3.00 low addOS-3.25 low addVA OD 20/40, 20/40VA OS 20/20, 20/25Patient is happy, not perfect but happy.Remember, every time you mess with the dist power, it will effect the near power and visa versa. For example…….addIf you change the add to , that’s like adding to the distance Rx and the patient may not see as well dist, but may see better at near.To counteract this change dist to-2.75 and add atBifocal contact lensesBifocal contact lenses
9 Presbyopic patient bifocal contact lenses The same will happen for near vision bifocal CL changes.Trial lens OD +4.00, add VA 20/30,20/20OS +3.50, add VA 20/30, 20/20Dist VA not working, change trial lens to……OD +4.50, add VA 20/20, 20/30OS +4.00, add VA 20/20, 20/30now, dist VA is great but near is horrible. What happened?YOU TELL ME!!!
10 Presbyopic patientBifocal contact lensesBy increasing the dist Rx we made the dist VA better but it also effected the reading VA by adding to the near RX.What should we have anticipated and done before putting those trial lenses on the patient’s eyes?
11 Presbyopic patient bifocal contacts Whatever you add to one focal length, take away from the other!We added to the dist Rx, which in turn also inadvertently add to the add also. Destroying their 20/20 near VA.Add to the near vision Rx to counteract the we added to the dist Rx.Anticipate what will happen if you make a change in the power and you will go through a lot less trial lenses.
12 Presbyopic patientMonovision is distance correction in one eye(dominant eye) and near correction in the opposite eye (non- dominant).Patients trying monovision need to be motivated and it will take a couple of weeks to get used to.People either love or hate monovision, those who love it get used to it fast.Never leave a patient with a pair of trial lenses they don’t feel comfortable with if they need to drive.Just like bifocal CL’s, monovision will sacrifice overall VA for the convenience.You will need to establish the dominant eye before anything.monovisionmonovsion
13 Determining dominant eye Presbyopic patientThere are many method of determining eye dominance. Page 133 has 5 ways.Usually dominant eye is the same as your writing hand, but not always!Here is one we can all try!Hold a pen at arm’s length. Using the tip of the pen as the sight, line the tip up with a fixation light while both eyes are open.DO NOT move your head or hand while you occlude one eye, then the other.One eye will keep the light and tip of the pen very close while the other eye will displace the tip of the pen and the light. The displaced eye is the non- dominant eye.monovisionDetermining dominant eye
14 Presbyopic pateint Rx OD -3.50,+2.00add OS -3.25,+2.00add OD is dominantAdd the patient’s add to the non-dominant eye.-3.50 dist+2.50 add-1.00 Rx for OS-3.50 Rx for ODThis patient will use the right eye for distance and the left eye will be used for reading.The patient will not have to concentrate any more than normal.Their brain will just do it. They will either love it or hate it.monovisionmonovision
15 Presbyopic patient Dominant eye is ALWAYS the distance corrected eye. Add the add power to the patient’s non- dominant distance Rx.That will become the “reading” eye.Remember…..There is a sacrifice of overall visual acuity with monovision.This is not a good suggestion for someone who drives all day or someone with a job that requires close reading or computer work all day.monovisionmonovision
16 Reasons for a bandage lens Pathologic patientContact lenses are used as a therapeutic to aid in healing or preventing pain from some sort of pathology.They are referred to as “bandage lenses”.There is no power in the lens. It is used as a bandage to promote healing.Corneal ulcerCorneal errosion or recurrant corneal erosion.Corneal abrasionChemical burnsBasement membrane dystropiesS/P incision corneal SxBandage lensesReasons for a bandage lens
17 Bandage lens help pain with bullous keratopathy patient Pathologic patientBandage lens help pain with bullous keratopathy patientBandage lens help to keep epithelial cells in place to heal a leaking bleb
18 Pathologic patient Bandage lens on a huge corneal abrasion Bandage lens over a penatrating keratoplasty
19 Pathologic patient BANDAGE LENS OVER CORNEAL ABRASION ANOTHER BANDAGE LENS OVER A CORNEAL ABRASION
20 PATHOLOGIC PATIENT… not COLORED CONTACT LENSESMORE COLORED CONTACT LENSES
21 APHAKIC PATIENTUsed in patients with out an intra ocular lens to replace the power of the crystalline lens.Can either be pediatric or adult caused by congenital, traumatic or removal of cataract with no intra ocular lens implanted.Either hydrogel (soft) or gas permeable can be used. Soft are preferred on pediatric patients.Aphakic lenses are usually very high plus.to depending on the refractive error before the cataract.BC and D are determined normally.Pediatric patients will have 12.5 to 13mm D. smaller than normal adult diameters.
22 Keratoconus patientSoft lenses are limited to very early keratoconus. They are not able to exert enough pressure on the cornea to change the shape and/or retard progression.Soft lenses are only used in a “piggyback system” in conjunction with a rigid lens.Gas permeable lenses are primarily used for keratoconus patients.Three types of fitting styles are used, apical bearing, apical clearance, three point touch.All of these have their flaws and constantly need to be changed because this is a progressive disease.
23 Keratoconus patientKeratoconus can very hard to fit properly. Because of the cone shape and thinning cornea, you must be very experienced in CL fitting.