Please select the eligibility criteria that correspond to the clinical trial below.
Title: Prompt Panretinal Photocoagulation Versus Intravitreal Ranibizumab With Deferred Panretinal Photocoagulation for Proliferative Diabetic Retinopathy
Brief Summary: The primary objective of the protocol is to determine if visual acuity outcomes at 2 years in eyes with proliferative diabetic retinopathy (PDR) that receive anti-vascular endothelial growth factor (anti-VEGF) therapy with deferred panretinal photocoagulation (PRP) are non-inferior to those in eyes that receive standard prompt PRP therapy.

Secondary objectives include:

* Comparing other visual function outcomes (including Humphrey visual field testing and study participant self-reports of visual function) in eyes receiving anti-VEGF with deferred PRP with those in eyes receiving prompt PRP.
* Determining percent of eyes not requiring PRP when anti-VEGF is given in the absence of prompt PRP.
* Comparing safety outcomes between treatment groups.
* Comparing associated treatment and follow-up exam costs between treatment groups.


Options:
A: Inclusion Criteria:

* Proliferative diabetic retinopathy eyes.
* Best Corrected-Visual Acuity at baseline \> 20/320 in the study eye.
* Patients with and without diabetic macular edema
* Type II diabetic subjects as defined by the World Health Organization
* aged ≥ 18 years.
* Women must be using effective contraception
* Ability to provide written informed consent.
* Indication of panretinal photocoagulation in both eyes

Exclusion Criteria:

* Vitreous hemorrhage or pre-retinal hemorrhage
* Eyes with prior scatter (panretinal) or focal/grid photocoagulation, within the previous 6 months.
* Atrophy/scarring/fibrosis/ hard exudates involving the center of the macula.
* Cataract
* Any intraocular surgery within 6 months before trial enrollment.
* Previous vitrectomy.

Any of the following underlying systemic diseases:

History or evidence of severe cardiac disease or previous thrombus-embolic event
B: Inclusion Criteria:

Age \>= 18 years -Individuals \< 18 years old are not being included because proliferative diabetic retinopathy (PDR) is so rare in this age group that the diagnosis of PDR may be questionable.

Diagnosis of diabetes mellitus (type 1 or type 2)

Any one of the following will be considered to be sufficient evidence that diabetes is present:

* Current regular use of insulin for the treatment of diabetes
* Current regular use of oral anti-hyperglycemia agents for the treatment of diabetes
* Documented diabetes by American Diabetes Association (ADA) and/or World Health Organization (WHO) criteria (see Procedures Manual for definitions) Able and willing to provide informed consent.

Meets at least all of the following ocular criteria criteria:

* Presence of PDR which the investigator intends to manage with PRP alone but for which PRP can be deferred for at least 4 weeks in the setting of intravitreal ranibizumab, in the investigator's judgment.
* Best corrected Electronic-Early Treatment Diabetic Retinopathy Study (E-ETDRS) visual acuity letter score \> 24 (approximate Snellen equivalent 20/320) on the day of randomization.
* Media clarity, pupillary dilation, and study participant cooperation sufficient to administer PRP and obtain adequate fundus photographs and optical coherence tomography (OCT).

  * Investigator must verify accuracy of OCT scan by ensuring it is centered and of adequate quality

Exclusion Criteria:

Significant renal disease, defined as a history of chronic renal failure requiring dialysis or kidney transplant.

A condition that, in the opinion of the investigator, would preclude participation in the study (e.g., unstable medical status including blood pressure, cardiovascular disease, and glycemic control).

* Individuals in poor glycemic control who, within the last 4 months, initiated intensive insulin treatment (a pump or multiple daily injections) or plan to do so in the next 4 months should not be enrolled.

Participation in an investigational trial within 30 days of randomization that involved treatment with any drug that has not received regulatory approval for the indication being studied.

* Study participants cannot receive another investigational drug while participating in the study.

Known allergy to any component of the study drug.

Blood pressure \> 180/110 (systolic above 180 or diastolic above 110).

* If blood pressure is brought below 180/110 by anti-hypertensive treatment, individual can become eligible.

Myocardial infarction, other acute cardiac event requiring hospitalization, stroke, transient ischemic attack, or treatment for acute congestive heart failure within 4 months prior to randomization.

Systemic anti-VEGF or pro-VEGF treatment within 4 months prior to randomization.

* These drugs should not be used during the study.

For women of child-bearing potential: pregnant or lactating or intending to become pregnant within the next 3 years.

* Women who are potential study participants should be questioned about the potential for pregnancy. Investigator judgment is used to determine when a pregnancy test is needed.

Individual is expecting to move out of the area of the clinical center to an area not covered by another Diabetic Retinopathy Clinical Research Network (DRCR.net) certified clinical center during the 3 years of the study.

Individual has any of the following ocular characteristics:

* History of prior panretinal photocoagulation (prior PRP is defined as ≥ 100 burns outside of the posterior pole)
* Tractional retinal detachment involving the macula.

  -- A tractional retinal detachment is not an exclusion if it is outside of the posterior pole (not threatening the macula) and in the investigator's judgment, is not a contraindication to intravitreal ranibizumab treatment and also does not preclude deferring PRP for at least 4 weeks in the setting of intravitreal ranibizumab
* Exam evidence of neovascularization of the angle (neovascularization of the iris alone is not an exclusion if it does not preclude deferring PRP for at least 4 weeks in the investigator's judgment).
* If macular edema is present, it is considered to be primarily due to a cause other than diabetic macular edema.

  -- An eye should not be considered eligible if:
  * macular edema is present that is considered to be related to ocular surgery such as cataract extraction or
  * clinical exam and/or OCT suggest that vitreoretinal interface abnormalities disease (e.g., a taut posterior hyaloid or epiretinal membrane) is the primary cause of any macular edema.
* An ocular condition is present (other than diabetic retinopathy) that, in the opinion of the investigator, might alter visual acuity during the course of the study (e.g., retinal vein or artery occlusion, uveitis or other ocular inflammatory disease, neovascular glaucoma, etc.).

  -- A vitreous or preretinal hemorrhage is not an exclusion if it is out of the visual axis and in the investigator's judgment is not having any affect on visual acuity.
* Substantial cataract that, in the opinion of the investigator, is likely to be decreasing visual acuity by 3 lines or more (i.e., cataract would be reducing acuity to 20/40 or worse if eye were otherwise normal).
* History of intravitreal anti-VEGF treatment at any time in the past 2 months.
* History of corticosteroid treatment (intravitreal or peribulbar) at any time in the past 4 months.

  --If the investigator believes that there may still be a substantial effect 4 months after prior treatment (e.g., dose of intravitreal triamcinolone higher than 4 mg), the eye should not be included.
* History of major ocular surgery (including vitrectomy, cataract extraction, scleral buckle, any intraocular surgery, etc.) within prior 4 months or anticipated within the next 6 months following randomization.
* History of (yttrium-aluminum-garnet) YAG capsulotomy performed within 2 months prior to randomization.
* Aphakia.
* Uncontrolled glaucoma (in investigator's judgment).
* Exam evidence of severe external ocular infection, including conjunctivitis, chalazion, or substantial blepharitis
C: Inclusion Criteria:

1. Diabetic patients older than 18 years
2. Presence of PDR (presence of retinal neovascularization, defined as active neovessels (fine retinal vessels with saccular dilatations or extremities covered with blood or associated with recurrent vitreous hemorrhage) with visual acuity better than 20/800 and with no previous laser treatment
3. Giving written informed consent.

Exclusion Criteria:

1. Presence of advanced PDR, i.e.: vitreous hemorrhage that would prevent documentation of the eye fundus or adequate retinal photocoagulation, or presence of traction retinal detachment
2. Presence of ring-shaped retinal neovascularization extending along both temporal arcades and the optic disc
3. Any abnormality of the vitreoretinal interface in the macular region for which the investigator would consider vitrectomy via pars plana to be necessary
4. Intravitreous injection of corticosteroids or of other antiangiogenic drugs 6 months before the evaluation for entry into the study
5. Inability to fixate and to conclude the automated static perimetry exam
6. Cataract surgery within the last three months
7. Posterior vitrectomy with scleral introflexion at any time
8. Acute ocular infection
9. Allerghy to fluorescein
10. Medical or psychological conditions that would prevent the patient from giving informed consent and concluding the study
11. Significant uncontrolled diseases which, in the opinion of the investigator, would exclude the patient from the study
12. Renal failure requiring dialysis or renal transplant or renal insufficiency with creatinine levels \>2.0 mg/dl
13. Untreated diabetes mellitus
14. Severe (blood pressure systolic \> 160 mmHg or diastolic \> 100 mmHg) AND untreated hypertension
15. Inability to comply with study or follow-up procedures.
16. Impaired or limited legal capacity
17. Participation in another clinical study in the last 30 days.
D: Inclusion Criteria:

* Macular edema associated with diabetic retinopathy
* Decreased visual acuity attributable primarily to DME
* Diagnosis of diabetes mellitus

Exclusion Criteria:

* High risk proliferative diabetic retinopathy
* Cataract surgery within 3 months of Baseline, or any other previous intraocular surgery
* Uncontrolled glaucoma
* Current or history of ocular disease in the study eye other than DME
* Major illness or major surgical procedure within 1 month prior to Day 1
* Uncontrolled blood pressure
* Glycosylated hemoglobin (HbA1c) greater than (\>) 12 percent (%) at screening
* Untreated diabetes mellitus or initiation of oral anti-diabetic medication or insulin within 4 months prior to Day 1

Answer: B