CASE ONE

Case History

• DC is a 33 year old white female
   
• Contact lens wearing history: she has 6 year DW soft lens wear
   
• Reason for OrthoK: Lens life is becoming very short
   
• No Medications
   
• Unaided DVA       OD 20/70       OS 20/70
   
• Subjective Refraction:    OD -1.50 - 0.50 x 090 20/20
                                             OS -1.75 sphere 20/20
   
• K's    OU 43.00/43.00 @ 090
   
• HVID    11.3 mm OU
   
• Diagnostic lens fitting       BC 8.54, AC 7.94, Diam. 10.0mm OU

Day One Visit

• Unaided DVA     OD 20/20     OS 20/20
   
• Subj Ref     OD +0.25 sph 20/20      OS +0.50 sph 20/20
   
• K's      OD 42.00/42.50 @ 090      OS 42.00/42.00 @ 090

Two Month Visit

• Unaided DVA      OD 20/20      OS 20/20
   
• Subj ref      OD Plano sph 20/20      OS Pl - 0.50 x 090 20/20
   
• K's      OD 42.00/42.25 @ 090      OS 42.50/42.25 @ 090

CASE TWO

Case History

• LG is a 38 year old white female
   
• Contact lens wearing history 17 years of soft lens wear
   
• Reason for OrthoK: correction has increased each of the last 5 years
   
• Meds Flonase and Allegra for allergies
   
• Unaided DVA      OD 20/80      OS 20/80
   
• Subjective refraction       OD -1.75 - 0.25 x 090 20/20 
                                             OS -2.00 sphere 20/20
   
• K's      OD 43.75/43.75 @ 090      OS 44.00/44.00 @ 090
   
• HVID      11.2 mm OU
   
• Diagnostic lens fitting      BC 8.49, AC 7.80, Diam 10.0 mm OU

One Day Visit

• Unaided DVA      OD 20/20      OS 20/20
   
• Subj Ref      OD +0.25 sph 20/20      OS +0.50 sph 20/20
   
• K's      OD 41.50/42.00 @ 090      OS 41.50/42.00 @ 090

10 Day Visit

• Unaided DVA      OD 20/40      OS 20/30
   
• Subj Ref      OD +1.50 - 1.75 x 065 20/20      
                        OS +1.75 - 1.25 x 125 20/20
   
• K's      OD 42.50/43.00 @090 0 distortion 
              OS 42.50/44.00 @ 090 1/2 distortion

Topography shows treatment zone decentered superiorly OU

New lenses were designed to improve centration. Sagittal depth of lenses increased by 5 microns

One Month Visit (one week after new lenses dispensed)

• Unaided DVA      OD 20/20      OS 20/20
   
• Subj Ref      OD +0.25 sph 20/20      OS Plano sphere 20/20
   
• K's      OU 42.75/42.75 @ 090

2 Month Visit

• Unaided DVA      OD 20/20      OS 20/20
   
• Subj Ref     OD +0.75 sph 20/20      OS + 0.75 sph 20/20
   
• K's      OD 41.75/42.00 @ 090      OS 42.00/42.00 @ 090

Patient's unaided DVA remains good with every other night wear.

3 Month Visit

Findings are unchanged from the 2 month visit.